Line Rider can be a source of income. My Line Rider Review cohost Bevibel, the creator of the 50-minute full-album track This Will Destroy you (ref https://youtu.be/qasxqKScOfY), does commissions full time in addition to their personal projects. Sometimes it’s small clients, sometimes it’s Disney. Helped them out with a music video for Guster once after the band saw a track they had already made to one of their songs. It’s a fun niche market.