Since 10 min the big exchange Poloniex.com just closed it doors. Actually it replies with an 502 error which means bad gateway - their server is broken.
I was just using it before that happened - there were only 31k users. Usually the server "crashes" or is overloaded with about 60k. So this is obvious not the case, and additionally the "server" is not a single one, but there are more.
No twitter announcement or anything was posted.
Weird thing is Tezos started today it's crowd sale and we see again an emerging pattern - some exchange crashes so people can't move their BTC and ETH at that moment.