Poker Stars, Full Tilt Poker, and Absolute Poker/Ultimate Bet were the 3 affected by what is known as "black friday" in the poker community. Poker Stars paid back players relatively quickly so I'm not sure anyone sold any of their frozen assets on that site. For Absolute Poker, the exchange rate began at 50 cents on the dollar and plummeted quickly from there all the way down to 1 cent on the dollar. For Full Tilt, the exchange rate started higher but also eventually went as low as 1 cent on the dollar. 14 months after black friday, Poker Stars bought Full Tilt Poker and has since returned all funds owed to Full Tilt players. Ultimate Bet still has not paid any players back and likely never will.
Fun story: I was a professional online poker player when black friday happened. And I just happened to be in Guatemala, on my honeymoon. Prior to going on my honeymoon, I had experienced the worst downswing in my career and all we had left (about 20k) was now frozen in my Poker Stars account. When we returned home, we didn't have enough to make the next month's mortgage payment. What we did have was about 1k in cash from our wedding gifts. The night after we got back, I took that 1k to the local casino and played in the highest cash game I could buy into. It was high risk but I didn't have time to grind it out at lower stakes. Luckily I went on an amazing heater, ran the 1k up to 10k and that was enough to last us until Poker Stars unfroze my account.
Fun story: I was a professional online poker player when black friday happened. And I just happened to be in Guatemala, on my honeymoon. Prior to going on my honeymoon, I had experienced the worst downswing in my career and all we had left (about 20k) was now frozen in my Poker Stars account. When we returned home, we didn't have enough to make the next month's mortgage payment. What we did have was about 1k in cash from our wedding gifts. The night after we got back, I took that 1k to the local casino and played in the highest cash game I could buy into. It was high risk but I didn't have time to grind it out at lower stakes. Luckily I went on an amazing heater, ran the 1k up to 10k and that was enough to last us until Poker Stars unfroze my account.