Hmmmm... would it make any difference if I did this (on reflection):
I think the commercialisation issue is a different one from the racism issue.
I mean, the man behind what's considered to be the first rock and roll record, Ike Turner's "Rocket 88", Sam Phillips was white. When he started recording rock and roll he said that if he could find a white guy who could sing that type of music and move the way the black guys he was recording could, then he'd make a fortune. A few years later, he was recording Elvis and did, indeed, make a fortune.
But, again, he genuinely loved the music. He wasn't black, but he grew up picking cotton in fields alongside predominantly black workers and from this he developed a deep love of the singing. From there he, like Elvis, became active on the black club scene.
Sure, he said that he would require a white singer in order to make a fortune from rock and roll, but is that racism, or is it a simple acknowledgement of the racism of the times? Is two white guys who love rock and roll, and have been part of the black music scene since they were children, making rock and roll records them perverting black music, or just making music that they love?
As far as commercialism goes, I can't see how that's a race issue at all. Had it been the case that black people playing white music would have made lots of money, you can bet your farm that that's what the record labels would have been churning out.
The only issues of race I see in this whole thing, are the racist attitudes of the time, which existed perfectly well without the music industry. In fact, as I said earlier, I think that the acknowledgement and appreciation of black music can only have helped to reduce racism. Not a great deal, and certainly not quickly, but as a small part of the process. Once something becomes normal and everyday, the less "other" it becomes.