Cutoffs last day of the season and today. I guess a lot of ppl got DQed. 50 Rating drop on horde is insane.
I looked through your VoDs and u even have a ton of with your rshaman. Maybe u played with or against wintraders that got banned and somehow their automated system banned you too. Sucks if your telling the truth :/
On a sidenote (seeing your browser bookmarks) be careful using USDTether it is not the same as USD - its a coin that is not backed and is not regulated. So anything can happen to it.