 SAN FRANCISCO--BUSINESS WIRE--- MDCA--Indaba Capital Management L.P. together with its affiliates, Indaba or we, which is the largest unaffiliated shareholder of MDC Partners Inc. NASDAQ: MDCA MDC or the Company, today commented on the supplemental proxy materials issued by the Company in connection with its prospective merger with Stagwell Media LP Stagwell. Based on its analysis of MDCs disclosures, Indaba has concluded that the additional information released only reinforces tha 