system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do some bands, like Tool, not want to have their music on Spotify?

Is it a record label thing? And if so, why do some bands have their music on Spotify while others, perhaps from the same label, don't?

EDIT: I ask because I noticed that even though Tool and A Perfect Circle are both fronted by Maynard, APC has their music on Spotify while Tool doesn't.
gpt
When you stream a song on Spotify or a similar service, they must pay the record company (or whoever owns the rights to the song) a royalty fee. Depending on the band and how much clout they have, this royalty amount varies, but its usually fractions of a cent. However, when someone purchases a song on iTunes, for example, the rights owner is paid 70% of the sale price (69 cents for $0.99 songs and 90 cents for $1.29 songs). And therefore, in order for an artist to make as much off a song streaming on Spotify as they do off a sale on iTunes, someone has to listen to it perhaps upwards of 100 times, depending on their payout from the streaming service.

TL;DR: the payout from 1 song stream on Spotify is fractions of a cent where buying that song on iTunes yields 70-90 cents for the owner of the rights to the song. Some artists hope people will buy their music if they can't stream it.