Re: Vader's WWF run
He left WCW after the Paul Orndorff fight. I believe Bischoff was going to fine him for the fight, or cut his pay(it's been awhile since I've watched the Vader shoot). And Vader decided to go elsewhere because of it.
If memory serves me correct Vader said ultimately he made less by leaving than he would have by staying in WCW and accepting being reprimanded for the Orndorff fight.