Looks like two instances were set up recently to host fake/bot and/or spam accounts: webmasto.online and mast-serv.site. Seeing a stream of follows of what look like autogenerated accounts (128 from each, at roughly the same time, so likely the same entity is behind both). Would recommend a #fediblock
@aral I also saw some from gtmastodon.online last week, though I'm not sure the server is still running.
@noeldemartin Good to know, thanks; will keep an eye out :)