Quite a few companies do it,
Pepsi and Coca-cola
Currys and PC World
at the end of the day they are making money from 2 separate revenue streams although in Commodore's case it was a stupid idea. The PC's themselves were crap and if they focused all their energy on improving the Amiga (and didnt take on Irving Gould) then we could have been typing these on new Amigas today. Nevermind, don't go through life thinking "what if", it will drive you mad. :-)