Alas, it's not easy to find actual statistics to describe the different income streams for the same artist on bandcamp vs. all other streaming services combined

Alas, it's not easy to find actual statistics to describe the different income streams for the same artist on bandcamp vs. all other streaming services combined. Every musician I've spoken to who does both uniformly reports 10-1000x more income from bandcamp than from streaming. I could be talking to a too-small or unrepresentative group.