A sale directly upon early-access release is never a good sign

There's also Mistral and Lumo as a non-google private alternative.

Celtic folk songs, and European folk in general

Misschien wat controversieel, maar ik hou van de uitspraak.

Sounds like a you problem

So how do the artists get paid then?

I had never heard of it either, but their website does a pretty good job of explaining it.