What about this...
With the purchase of the album comes a card. The card has an activation code. You punch in the code, and your email on Recovery.com.
Then, every so often, bonus material gets sent to you via email. You get the bonus tracks right away, with the album. But then, you will randomly get sent new freestyles, bonus tracks, bonus videos, etc. Maybe even a discount on Beats by Dre headphones. Stuff like that, for a year.
Sure, all that bonus material will be available on the web right away also, but you would be the first to know, effortlessly. I think it would intrigue people.
Anyone have any good promotion ideas? I got more!