I’ve set registration to Require application again, don’t like this bots creating accounts.
Also I’m running into email limitations. Using the Sendgrid Free plan of 100 emails per day, but if a couple of member have email notification on, I’m reaching that 100 very quickly. How do others handle the high email traffic ?

Just did that for my instance. Luckily it’s fairly easy. Since there were no human registrations after those bots I just looked up the lowest bot id in the
local_usertable which was9and then useddelete from person where id in (select person_id from local_user where id >= 9);. Thanks to the references and triggers on the table, the rest of the database was also cleaned up by that, including thelocal_usertable.