From a musician to another, as someone else replied, if you’re making your work available digitally then you immediately lose control over if people pay for it or not. The good thing is, the ones who want to support you will if you give them a way. But you just can’t coerce them anymore. Spotify and other similar platforms are getting the whole cake because of the convenience that they offer, that’s it. And I’m sure you know how little of that cake trickles down to you.