Arena style tourneys have displaced many of the others. I don't think there has been any official announcement but from talking to a staff member, many of the old style tourneys were being cancelled due to lack of players.
There were some official 15|10 tourneys earlier today.
ok,thank you very much! Can u also explain about 30+0 quad tourney?
I'm not really sure how the Quads are working. My guess is that each round they are like the Daily tourneys with group size of 4 and are knockout style with 2 players moving through each round (more if there are ties). Number of rounds will depend on the total number of players, but I'm not sure there and they may be limited to 4 rounds.
I am playing one and there is me and one another player full points (4/4). What will they do then?
It's just a guess but it will work just like the Daily tourneys do. After the 1st round, they will pair you to new groups using that same algorithm and repeat each round.
ok, thank you very much!
That's all speculation based on looking at crosstables of previous events and based on what Quad normally means. I could be very wrong 
Is the 15+10 live chess.com tournament stopped? Instead I see a 30+0 quad tournament. Can anyone explain?