Without a doubt 888Poker, followed by ACR and then PS. ACR would be ahead if CardsChat freerolls were still taking place there. But since they stopped ACR freerolls, 888Poker took the lead.
PokerStars was my birthplace in Poker but it lost a lot of space over time. And to make matters worse, they have now removed our freerolls.
In fact, I find it curious that PokerStars ends our freerolls... I read about the amount of money they put into Neymar's
hands as an ambassador, and they have the nerve to close our tournaments claiming that the freerolls don't generate value for they....