I got a request on spotify to continue tracking me. On some level I actually thought about saying yes if it meant spotify would get more revenue for my free consumption, and by proxy, musicians. I chose to say no. But I don't know if that was the right call. I don't care what spotify does with my data.
A quick check suggests maybe 1/11th of revenue is from advertising on spotify. Assuming musicians get a fixed share of this, and non targeted advertising revenue is small... yeah probably not a big drop.