Yeah, too bad that once again there isn't really any actual freedom to choose there for any riders of note...
No matter what the race rules say, there's still the "You don't ride one of those while WE'RE paying you..." unspoken rule that's kept between companies with a backlog of foopers to sell, and the talking heads who get paid well as the marketing figure heads...
Pro racing is meaningless. It's nothing but a TV commercial.