I have, and did for quite a long time. After
poker stars and most others couldn't let American players play, I stopped.
I started back when CC sent me an email stating that there was indeed somewhere we could play.
I started playing again, got used to playing again, now I play once in a while. I mostly just play Poker Stars Omaha Hi/Lo. I play in very few CC tourneys as of late. Too many in it for the free roll types. lol Even though you don't have to pay for an entry doesn't mean you should not respect CC and the game of poker itself and do the best you can, learning the whole time.