List by Automated Lists
Domain unverified accounts that follow more than 5k accounts. There is no implication that these accounts themselves are not run by humans, simply that they follow a large number of accounts.
Includes accounts which look like *or boost* follow farmers, spam, inauthentic accounts, content mills (especially without alt text), MA/fundraise-only accounts, grifters, scammers, scrapers, etc. Includes many actual humans.
List by JJ
Anon or pseudo-anon. Heavy use of memes and images. Usually political. Preaching to choir for high engagement. Uses profile accelerator techniques, like mass following, using hashtags like #bluecrew, etc.
List by Blue Wavers
List by Tal Lavin
Facebook meme type accounts, participating in followback schemes. Resistance-flavored pablum. Either incipient bad actors, or super annoying, or both.