I did a little digging and it seems they’re not banning accounts at the relay level, it’s all AppView-level banning for now. So as long as you download your repo from time to time and set a DID:Web (or do all the recovery key stuff if using their DID:PLC) you can get up and running on a new host pretty seamlessly, you just sort of reconstitute in another AppView, Terminator 2 style. You're still indexed on the big relay despite the AppView ban. The relay policy for now appears to be to just filter for perhaps CSAM and maybe spam or sybil-type attacks (legal and network threats, basically).

Of course there is only one relay at present, so until there are at least a few up and owned by different entities you're still at the graces of whoever at Bluesky's legal entity sets the relay policy. And they've kept the directory in-house too, so they have that ICANN pointing-power over all relays anyway. (They say the'll spin out the directory into an independent non-profit, but I'm very wait and see on that one.) Also even if you're de-indexed from the relay an AppView can still pull directly from your PDS if it wants to. So things are not so black and white over there. But one thing is for sure, everything developer-wise over there is super clunky.