People is overreacting.
Pop music is a business for labels.
They release Remixes EP in order to sell more and get higher positions.
The Remix featuring Artists is the same situation, they release it in order to sell more copies and help the song peak higher.
You can decide if you want to spend money or not. It's not like they're stealing those sales.
People hate the fact Katy uses remixes because she's making the best out of them.
