Users yes, but not integrated with Hive. Not that it hasn't crossed my mind, zcash is still the BTC backup chain. I assume you mean zkrollups or zkverify here; I have been pondering for a while how integrating privacy measures like zksnarks could work. How do you like to use zkverify, have you tried it yet? How do you feel about the Halo2 upgrade to ZEC and the pasta curves?