According to IAC's latest SEC filing Quarterly 2 Report
On pages 9 and 10 can be read "On January 20, 2011, Match acquired OkCupid for USD50.0 million in cash, plus potential additional consideration of up to USD40.0 million that was contingent upon OkCupid's 2011 earnings performance. During the second quarter of 2011, the provisions of this contingent consideration arrangement were amended.
Pursuant to the amendment, USD30.0 million was paid to the former owners, and a potential additional payment of up to USD10.0 million is contingent upon revised performance goals. The fair value of the contingent consideration at June 30, 2011 is USD10.0 million and is included in "Accrued expenses and other current liabilities" in the accompanying consolidated balance sheet. The Company estimated the fair value of the contingent consideration using its judgment of the likelihood of achieving the revised performance goals, which incorporates significant unobservable inputs."
The former owners can now run away with the money in their pockets!