The majority of new accounts created at mander.xyz would post ads about pills or crypto wallet scams shortly after being created. Now I have to manually accept registrations, and many do write that they want to make a post about their product. I deny those. But a few do get through.

I am not sure that they are bots, though, because they do fill in the registration form. And I might be wrong, but I think that a bot would need to be tuned specifically to interact with lemmy instances. I think that these might be actual people that manually crawl the web and spam.