I think the story was that Rob Shirley had signed up a bunch of Mastercraft dealers that he knew, to carry the new boat. When Mastercraft got wind of it, they threatened to pull out of any dealers that went ahead with the Infinity. There was likely language in the dealership agreements preventing them from carrying a directly competitive line from another manufacturer.
My understanding is that when Infinity lost most of its dealer channel, they were in a bad spot. Too bad, because given enough time and money, Rob Shirley might have really developed that center v-drive idea into something good.