Plenty of songs I would love to play in Rock Band Blitz just sitting there asking to be exported and for Harmonix to take my money. I never played any of the Rock Band's due to not being able to play with a guitar comfortably. That said I own copies of Rock Band, RB 2, Lego RB and even have a copy of RB3 just to export and play in RB Blitz.
I realize we Blitz owners are a small portion of the RB community but you are allowing for individual downloads of Blitz songs for RB3 owners who did not wish to purchase Blitz. Throw your loyal Blitz customers a bone.
A customer that has well over 800 songs and spent quite a chunk of change on this great game.