Hi, @cerati, welcome to my chess community! :)

A STEEM chess club would be an interesting idea, but I think we should consider a few things:

• The future (and the name) of STEEM is uncertain ... so better lets wait for the outcome of all that.
• After using both sides, Chess.com and Lichess, I personally prefer the latter, as it is simply, fast and open-source. Furthermore @schamangerbert's STEEMChess tornaments are taking place at Lichess.
• I personally don't like PayPal, but that's of course not the main criterion.