Quoted from Roostking:Two different scenarios. Cliff was not fired, Jason was not fired. Ace and Criss were fired, rehired, fired... Metallica is doing the right thing, and so is kiss. Those two screwed themselves..
You need to do some more research. Ace left because he was tired of the Bull from Paul and Gene Selling merchandise to kids etc. Hired a lawyer thinking it was a friend, that screwed him on signing ACE's likeness away. When Peter left the band was already done. You have to remember Paul and Gene think they are Kiss and any other member is just an addition. Still pissed on the way Paul treated his fans at this years SEMA, and the last concert in Calgary he was sitting on the stage during songs total BS.