Jason Stillion, on 29 November 2012 - 13:51, said:
Not sure, but RIAA hasn't gone after Google about Google music where you upload your own music files, under the agreement you agree to about only uploading files you legally have rights to.
Most likely because it's for personal use and actually sharing it isn't possible unless people have your account credentials. I believe some song providers sell DRM free these days as well, would be a bit of a hassle having to get someone to show receipts for a whole personal collection that could be DRM free.
As long as it stays for personal usage, the RIAA seem to rather spend their time going after the sharing sites/services.