Why not? I don't have time for many ads and will go to great lengths to get rid of them - especially ones I don't like. With Spotify this is even easier because there are a number of replacements available.
I think I'm using a different app to the rest of these commenters, I don't have anything as bad as people are talking about. Or do people just use the free version of the app?
Spotify's home page is full of ads - even for premium users.