While I talked with C4 a few times, it always seemed that the deal was never a mutual win-win, it was always stacked in their favor. If we did not provide the aggressive results that they wanted, they would take over all of our C4 clients and give them to someone else. As a small company it was too risky for us to deal with C4.

I'm not surprised the original C4 investors decided that they had extracted as much value as possible from their original investment and cashed out.