Board Game Arena

So it seems that the 'weird accounts' have been deleted. Does anybody know what happened and what triggered the action? The arena and all time ranking do seem to have been repaired for the most part (some top ten players are still strange - few games and very high scores, but most seems to be ok).

Was it just Clash of Decks, or was the site affected as a whole? Also, it seemed like 7 or 8 accounts for Clash were removed. I wonder if it was all one persons doing or a group.