For non-multimillion-streaming artists, arrangers, composers, and lyric writers, Spotify et al are the new greedy side of the music industry IMO. In reality, nothing comes back to the artist and as an example, the owners of Spotify are pulling an abstract amount of money out of the companies into their pockets.
That said, I think it’s a good idea to place the music onto services such as Spotify, Google, iTunes, Youtube, and Amazon. That way, it’s easy to be heard. I get royalties several times a year, but not from streaming. My royalties mainly come from songs played on national radio in the nordic countries, downloads of music, concerts, and physical media (CDs). This is not big money because my royalties usually are 25% of the composer cake where I’m noted as an “arranger” (that’s payments for mixing and mastering for little money). I do not say this for bragging, just for explaining where I see the money in my world.
I really believe that it’s very important to use channels such as Bandcamp and CD Baby for selling downloads and physical media, the streaming services are for most of us not usable. I believe they are important for credibility and PR, but I clearly mean that these very rich owners of the streaming services are standing on the artist’s shoulders, leaving mostly only dust and cents to them.