Site official: http://en.playchess.com/
Since 2001, 20th september.
Membership: 34,90 €/year STARTER; 49,90/year PREMIUM ( all about: HERE)
Starting on 2016, the Playchess account is included on the ChessBase Account ( 90 days FREE OF CHARGE for the Starter account!).
YES
YES https://play.chessbase.com/
http://download.chessbase.com/download/PlaychessV7Setup.exe
Utilities offer: PLAY; WATCH; USERNAME; CHAT; SAVE GAMES; STORED RATING; LIVE BROADCASTS; TOURNAMENTS (organized by the administrators and users too); LIVE MULTI-BOARD DISPLAY; ENGINE IN MULTI-BOARD DISPLAY; LIVE COMMENTARY; INTERNET CHESS TV; TITLED PLAYERS SIMULTANEOUS EXHIBITIONS; LIVE TRAINING; OTHER VARIANTS OF CHESS GAMES; BET ON YOUR OWN GAMES WITH VIRTUAL CURRENCY (1 €=10 DUCATS); BET AND PREDICS THE MOVES; SHARE YOUR GAMES ON THE BEST VIEWER REPLAY GAMES.
In addition, due to the ChessBase Account: LIVE DATABASE; VIDEO, MY GAMES CLOUD; LET'S CHECK; FRITZ ONLINE; ENGINE CLOUD; OPENINGS; TRAINING; CB NEWS.
Official daily tournaments prizes: THE BEST OFFER PRIZES, FREE MEMBERSHIP (top five and 10 lucky prizes for every tournament)!
NEW! REAL-TIME GAME COMMENTARY!
What can improve: More fighting against cheaters and new methods to detect it in real time; More effective penalty for laggers; Add TOURNAMENTS on Web variant (but you can play if join a web room and someone with soft client, create a tournament there) and especially on the mobile devices app; Add Swiss, Knock-out and Round Robin TEAM TOURNAMENTS; Add option for users to organize ducat prizes tournaments.
Conclusion: here we find the best offer-price, for a commercial server!
Shopping store: http://shop.chessbase.com/en/