Why Do Indie Artists Ignore/Abandon Soundcloud.com?

It just looks odd when Soundcloud is prime for SEO, especially with Google, usually resulting on the first page when looking up an artist.

An artist may be doing 6-7 numbers on Spotify, but the more you sus them out, their YouTube channel isn't usually as close and then their Soundcloud is either abandoned or has zero-effort put in.

Is Soundcloud even worth it?