Who listens to radio anyway? Just use spotify et al, no ads. Sure, spotify tracks my music preferences too, but I don't see any harm in that, it just makes the experience better.
Haven't had that (I actually had to google Drake, never heard of him). It probably depends on how you use the service, I never use the front page or top charts functions.
He was placed on the cover of every album for the front page, top charts, and a hell of a lot of other playlists as well [1], including playlists that didn't feature him (half of playlists, according to Reddit detectives).
It was so bad, that Spotify was issuing refunds [0], because they basically had one artist take over the whole site.
As my anecdotal example of the insanity of the promo, I had Drake featured in playlists for Symphonic Metal. From Nightwish to Drake... Is a hell of a transition.