I feel like Joyful Noise has a pretty great formula with their JNR200 club (or whatever it's called). The most committed fans receive the "collector security" of a strict 1-copy-per-member subscription (no one can get a 2nd copy, non-members don't get copies outside of the secondary market, no member ever misses out on a release but it's still hyper-limited) and the label gets security knowing everyone in the hyper-exclusive club has agreed to buy every release in exchange for that strict exclusivity.