AMENDMENT NO. 10

EXHIBIT 10.15.10

Execution Copy

AMENDMENT XX. 00

XXXXXXXXX XX. 00 dated as of March 8, 2007, to the Credit Agreement referred to below, between MDC Partners Inc., a Canadian corporation (“MDC Partners”), Maxxcom Inc., an Ontario corporation (“Maxxcom Canada”), Maxxcom Inc., a Delaware corporation (“Maxxcom U.S.” and together with MDC Partners and Maxxcom Canada, the “Borrowers”), each of the Lenders identified under the caption “LENDERS” on the signature pages hereto and JPMorgan Chase Bank, N.A. (“JPMCB”), as U.S. administrative agent for the Lenders (in such capacity, the “U.S. Administrative Agent”).

The Borrowers, the Lenders party thereto (individually, a “Lender” and, collectively, the “Lenders”), the U.S. Administrative Agent, JPMCB, as Collateral Agent (in such capacity, the “Collateral Agent”), and JPMCB, Toronto Branch, as Canadian Administrative Agent (in such capacity, the “Canadian Administrative Agent” and together with the U.S. Administrative Agent, the “Administrative Agents”) are parties to a Credit Agreement dated as of September 22, 2004 (as amended, the “Credit Agreement”). The Borrowers and the Required Lenders wish to amend the Credit Agreement in certain respects, and accordingly, the parties hereto hereby agree as follows:

Section 1. Definitions. Capitalized terms used in this Amendment No. 10 and not otherwise defined are used herein as defined in the Credit Agreement.

Section 2. Amendments. Effective as provided in Section 5 hereof, the Credit Agreement shall be amended as follows:

2.01. References in the Credit Agreement (including references to the Credit Agreement as amended hereby) to “this Agreement” (and indirect references such as “hereunder”, “hereby”, “herein” and “hereof”) shall be deemed to be references to the Credit Agreement as amended hereby.

2.02. Section 1.01 of the Credit Agreement is hereby amended by amending the following definitions to read in their entirety as follows:

“H Acquisition” means the proposed acquisition of 51% of the Capital Stock of H pursuant to an acquisition agreement on terms similar to those set forth in the H Acquisition Term Sheet.

“H Acquisition Term Sheet” means that certain letter of intent, dated December 8, 2006, for the proposed purchase of 51% of the Capital Stock of H, a copy of which was previously provided to counsel to the U.S. Administrative Agent.

“H” means H, LLC, a Delaware limited liability company.

“R” means R LLC, a Delaware corporation.

“R Acquisition” means the proposed acquisition of 60% of the Capital Stock of R pursuant to an acquisition agreement on terms similar to those set forth in the R Acquisition Term Sheet..

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“R Acquisition Term Sheet” means that certain letter of intent, dated January 3, 2007, for the proposed purchase of 60% of the Capital Stock of R, a copy of which was previously provided to counsel to the U.S. Administrative Agent.

2.03. Section 7.06 of the Credit Agreement is hereby amended by (i) deleting the word “and” at the end of clause (o) therein, (ii) adding new clauses (p) and (q) to read in their entirety as follows and (iii) relettering the existing clause (p) therein to “(r)”:

“(p) the H Acquisition, provided that not more than U.S. $4,500,000 of the consideration in respect of the H Acquisition shall be payable in cash at the time of the consummation thereof;

(q) the R Acquisition, provided that not more than U.S. $5,500,000 of the consideration in respect of the R Acquisition shall be payable in cash at the time of the consummation thereof; and”

Section 3. Representations and Warranties. Each Borrower represents and warrants (as to itself and each of its Subsidiaries) to the Agents and Lenders that (a) the representations and warranties set forth in Article V of the Credit Agreement, as amended hereby, and in each of the other Loan Documents are complete and correct on the date hereof as if made on and as of such date and as if each reference in said Article V to “this Agreement” included reference to this Amendment No. 10 and (b) no Default shall have occurred and be continuing under the Credit Agreement, as amended hereby.

Section 4. Confirmation of Security Documents. Each of the Borrowers hereby confirms and ratifies all of its obligations under the Loan Documents to which it is a party, including its obligations as a guarantor under Article III of the Credit Agreement as amended hereby. By its execution on the respective signature lines provided below, each of the Guarantors hereby confirms and ratifies all of its obligations and the Liens granted by it under the Security Documents to which it is a party, represents and warrants that the representations and warranties set forth in such Security Documents are complete and correct on the date hereof as if made on and as of such date and confirms that all references in such Security Documents to the “Credit Agreement” (or words of similar import) refer to the Credit Agreement as amended hereby without impairing any such obligations or Liens in any respect.

Section 5. Conditions Precedent to Effectiveness. The amendments set forth in Section 2 hereof shall become effective, as of the date hereof, upon (a) receipt by the U.S. Administrative Agent of one or more counterparts of this Amendment No. 10 executed by the Obligors and the Required Lenders and (b) evidence that all fees and expenses agreed by MDC Partners to be payable in connection with this Amendment No. 10 have been paid in full.

Section 6. Miscellaneous. Except as herein provided, the Credit Agreement shall remain unchanged and in full force and effect. This Amendment No. 10 may be executed in any number of counterparts, all of which taken together shall constitute one and the same agreement and any of the parties hereto may execute this Amendment No. 10 by signing any such counterpart. This Amendment No. 10 shall be governed by, and construed in accordance with, the law of the State of New York.

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IN WITNESS WHEREOF, the parties hereto have caused this Amendment No. 10 to be duly executed and delivered as of the day and year first above written.

	MDC PARTNERS INC.
	By:	/s/
		Name:
		Title: Authorized Signatory

	By:	/s/
		Name:
		Title: Authorized Signatory

	MAXXCOM INC., an Ontario corporation
	By:	/s/
		Name:
		Title: Authorized Signatory

	By:	/s/
		Name:
		Title: Authorized Signatory

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	Agreed as set forth in Section 4 above:
	GUARANTORS
	1208075 ONTARIO LIMITED 1220777 ONTARIO LIMITED 1385544 ONTARIO LIMITED 2026646 ONTARIO LIMITED 656712 ONTARIO LIMITED XXXXXXX XXXX XXXXXX XXXXXXX INC. XXXXXX XXXXXX CANADA INC. XXXXXX-XXXXXX CANADA LTD. XXXXX XXX DESIGN INC. XXXXX XXX HOLDINGS LTD. XXXXXXXX + PARTNERS COMMUNICATIONS LTD. COMPUTER COMPOSITION OF CANADA INC. XXXXXXXXX BAS MAXXCOM (NOVA SCOTIA) CORP. MAXXCOM INTERACTIVE INC. STUDIOTYPE INC. TREE CITY INC.
	By:	/s/
		Name:
		Title: Authorized Signatory

	By:	/s/
		Name:
		Title: Authorized Signatory

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	ACCENT ACQUISITION CO. ACCENT INTERNATIONAL, INC. ACCENT MARKETING SERVICES, L.L.C. BRATSKEIR & COMPANY, INC. XXXXXXXX DIRECT, INC. CMS U.S. HOLDCO, INC. COLLE & XXXXX, INC. CPB ACQUISITION INC. XXXXXXX XXXXXX & BOGUSKY LLC DOTGLU LLC XXXXXXXX XXXXXX LLC FMA ACQUISITION CO. HELLO ACQUISITION INC. KBP HOLDINGS LLC XXXXXXXXXXX BOND & PARTNERS LLC XXXXXXXXXXX BOND & PARTNERS WEST LLC LAFAYETTE PRODUCTIONS LLC MACKENZIE MARKETING, INC. MARGEOTES/XXXXXXXX + PARTNERS LLC MAXXCOM (USA) FINANCE COMPANY MAXXCOM (USA) HOLDINGS INC. MDC/KBP ACQUISITION INC. MF+P ACQUISITION CO. MONO ADVERTISING, LLC PRO-IMAGE CORPORATION SABLE ADVERTISING SYSTEMS, INC. SMI ACQUISITION CO. SOURCE MARKETING LLC TARGETCOM LLC VITROROBERTSON LLC ZG ACQUISITION INC. ZYMAN GROUP, LLC
:	By:	/s/
		Name:
		Title: Authorized Signatory

:	By:	/s/
		Name:
		Title: Authorized Signatory

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	LENDERS
	JPMORGAN CHASE BANK, N.A.
:	By:	/s/
		Name:
		Title

	JPMORGAN CHASE BANK, N.A., TORONTO BRANCH
:	By:	/s/
		Name:
		Title

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	BANK OF MONTREAL (CHICAGO BRANCH)
:	By:	/s/
		Name:
		Title

	BANK OF MONTREAL
:	By:	/s/
		Name:
		Title

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	THE BANK OF NOVA SCOTIA, by its Atlanta Agency
	By:	/s/
		Name:
		Title

	THE BANK OF NOVA SCOTIA
	By:	/s/
		Name:
		Title

	By:	/s/
		Name:
		Title

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	TORONTO DOMINION (TEXAS) INC.
	By:	/s/
		Name:
		Title

	THE TORONTO-DOMINION BANK
:	By:	/s/
		Name:
		Title

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	CIBC INC.
:	By:	/s/
		Name:
		Title

	CANADIAN IMPERIAL BANK OF COMMERCE
:	By:	/s/
		Name:
		Title

	By:	/s/
		Name:
		Title