Love the idea of encrypting and owning my own data. But here's my question. My encrypted data needs to be unencrypted and read by third parties eventually. What's to stop those third parties from just copying and saving my data, then selling it later to a data broker, who then goes out and resells it on an open or black market?

Can someone clarify use cases for these encrypted services? Otherwise, it seems a lot like when RIAA tried to stop users from distributing MP3s. Once the cat is outta the bag, can't really put it back in. Zeroes and ones are trivial to copy.