Loads of bands organize/trade/sell recordings of each show. It's smart and effective to prevent commercial piracy, mastered early on by the Dead community, but also Phish, The Who, Bruce, and U2 have done it.
The Stones "Vault" series has been an effective way to add copyright protection to their own unreleased master recordings, which ended up stolen from them at some point, by
Forum:
Buy/Sell/Trade