If you want to give your music away to people, that's great. This is just about the price to Spotify and services like it.

If you don't want the royalties from Spotify, you can do something like donate them to charity.

Giving Spotify a discount is something I'm not fond of, because you're either hoping they give you better placement which is basically payola, or you're getting nothing back so you're making a donation to a giant corporation.