According to a Seattle Times interview with Red Octane co-founder Kai Huang, Activision may consider a subscription based service for future Guitar Hero DLC.
“That’s definitely one of the things we would love to do,” Huang said. “There are a lot of issues around music licensing. Customers want it. I know I want it. We’re trying to make that happen.”
It may be simpler that way. Pay a monthly fee, like a lot of other music services, and download all you want.
Providing more than 10 songs are put out a month and it’s cheap, it might eventually be the way to go.