All of the above. The only cases where they appear to be getting deleted is when they run at the same time. But there have been instances where it appears multiple accts were used to hide restarts.

Let's say that they're only getting removed if they play 2 accts at the same time. So basically everything you could possibly imagine that you could do with a multi acct is being done except the 1 thing they get deleted for. And more and more it seems people are pushing that boundary, telling other players they're making multi accounts, even bragging about it to other members and not getting deleted. It's been used to suicide one tag multiple times in a set to hide restarts, it's been used to hide identity to join tags and suicide from them. Pretty much they've been used in most ways imaginable to suicide and grief ppl.