If the silly Beatles don't play ball, Harmonix doesn't earn the cash.
When we've seen quotes from this sector of the industry saying that musicians should pay to get their music in, that's when you know there's a problem. This is still an industry that needs to figure out how it will handle itself in a way the consumer and their partners are all happy with.
To be honest, I don't mind buying a new disc. In fact, most of the time, the new disc is a better value than the DLC. What bugs me is when you can't easily play the songs from one disc on a different GH title through any simple method. GH made an effort to become a platform, and seriously failed at transferring the bulk of their back-catalog. Then, they made me need a booklet I threw away because I don't keep many of the boxes and pack-ins that come with most video games.
Eventually, I imagine success will be realized when other company sponsors actually pay them to deliver the content users want, but brand their names to it. Yes, I know Coke and KFC have sponsored GH before, and I know that Harmonix has utilized assets from Viacom, as well. And you know what? It's worked, it's kept some prices down, and delivered some great content. I think that's where things will probably head, and in this case, I'm all right with it.
Not gonna buy a subscription, though, because that goes down the tubes when you decide to stop paying for it.