According to a Verge story, the decision was an easy one for Spotify. The company loses money when someone streams a Neil Young song, but the minimum ad spend for Rogan's podcast is $1 million. https://www.theverge.com/2022/1/27/22904463/joe-rogan-spotify-neil-young-decision-moderation-podcasts

Which also explains why Rogan's show wasn't included in the 20,000 episodes taken down by Spotify for Covid misinformation.