There has been a big spike in growth over the last 2 days, and some rather suspicious new instances appeared out of nowhere with thousands of new users, even though there is close to no activity in any of them.
Could all those be bots? Would it be smart to block those instances preemptively?
This seems to roughly correlate with sub.rehab topping InternetIsBeautiful. The distribution of subreddits with new lemmy instances is what convinced me to switch, that spike might be my fellow migrants.