They break the rules they have to be fired for the company image, doesn't mean they want to lose them.
Masters was sacrificed because he failed tests and looked like a huge bodybuilder, since he was a medicore talent and not a draw he could be dumped so he had time to reform his steroid using ways.
Eugene was found passed out in a hotel, it would have looked bad not to fire him and he was only re-hired as a favour to Orton and then promptly fired again because he had got fat.
Cade, is someone they were preparing to push as a top singles star (until he had a fit on a plane) and had headliner ideas in mind one day, it was a given once some time had passed he'd be back.