Musicians/DJs/etc. also often do corporate gigs to eat. I'm sure they'd often much rather be playing for passionate fans in a bar than playing at some event where half the time the attendees are largely ignoring them except to wish they would turn down the volume so they could have a conversation.

Somewhat different situation than the Spotify case which is arguably mostly an advertising channel while corporate gigs actually pay directly. But creatives of all stripes doing things they'd rather not do so they can live, do what they want to do, and have a sliver of a sliver of a chance to breakout is extremely common.