I think I would like the idea (and at first this my understanding) if you could buy one wallpaper for $1 (or a pack of few for $3) and the 70-90% would go to the artist. Also app would have to limit tracking to just some basic stuff. I know you can get wallpapers free, but supporting something that looks great on your screen would be a nice option.
Of course subscription service for this is mad.
Things that are/were irritating to me the most: