Allow Bot accounts, mark them and make it that they can't recive gifted subs.
There are a lot of bots and some of them get gifted subs because they are just a "normal" user. anotherttvviewer, carbon14xyz etc. are all known bots and I think the developers of the bot should have the option to mark them as bots like in discord. It would be easier to understand for streamers, and they shouldn't get gifted subs.