Symptoms are that initial load is fine - or at least, looks fine, I can't verify it actually loaded notes from all follow. But after intial load, no new notes come in. It seems most relays are not willing to activate the subscription. Primal web seems to be working marginally better, but when using Amethyst it's broken, so there might also be some difference between clients.
Not sure how to go about unloading dead users. And it's circumventing the issue, it should just workโข๏ธ with a few thousand follows.
I'll see if I can torture the wine.