[nyanpasu64]

Hmm, you have to pay to become a member, and additionally pay for each song you listen (if you exceed the "new user" credits).

Can you sign up as a listener and an artist? I tried but it says "This username is already registered" and "This email address is already registered".

[satellites]

Paying to become a co-op member is optional. Not required for listening.

The latter seems like an issue though. It would be great to be able to convert a listener account into an artist account, or to have both under one account entity.

[peteratomic]

We're about to launch an long-anticipated User API which is going to solve this double account type problem (listener + artist + etc). Supposed to drop in December.

And the other comment is correct... co-op membership is optional.