DragoonXD [copied from the Creators post] at 15:40 on March 31st, 2011:
At this time (and for the foreseeable future), RBN2 songs can only be purchased in the in-game Music Store.
If you try to click through the Buy link on an RBN2 song detail page (example:
http://www.rockband.com/songs/UGC_5005724) , you will receive a 404 error from Xbox.com.
We will be removing those links and replacing them with a note directing users to the store later this month.
The lack of web links is intentional. They were always supposed to be hidden from both the in-game marketplace and website marketplace. When RBN2 was launched, this bug was fixed, and all new content is hidden from both. The fact that we had “Buy Now” links on the RBN song pages on rockband.com was a result of our zealous web developers making RBN consistent with DLC. Our numbers show that only a small percentage of songs are purchased through the website, and we do not expect any significant downturn in RBN sales from this change.
The upside of this from our perspective is that songs are no longer available outside of Rock Band, so unpublished songs and newly released songs can’t be purchased prior to our release. Plus, we can coordinate launch dates of multiple songs, stage PR stunts, etc.