There is no barrier for entry, you pay something like 30$ a year to Distrokid and you can upload whatever. I know a dude who makes a track a day of some sort of trance music and it’s just the same track with little to no variations and he uploads it practically unmixed and unmastered. I also know someone who uploads Sumo generated AI dance music every other day but he uses some AI friendly distributor not distrokid. It is insane