if proving the ownership of a utxo somewhere doesn't provide better Sybil resistance than fidelity bonds then this is incorrect
"Sybil resistance in joinmarket is good enough as it increases the cost of the attack. However, joinstr provides the best sybil resistance among all the coinjoin implementations."
its not at all clear how joinstr improves Sybil resistance over JM with aut-ct
It's not incorrect.
I hope you read the other post about market making. If it's still unclear I can share an example or you will have to test both:
- Alice creates a pool with JM=True because she already has a fidelity bond and using it for Joinmarket
- Bob and Carol join the pool
- Everyone shares aut-ct proof that proves they own a P2TR UTXO worth 0.1-0.2 BTC that is unspent until last block and aged more than 2016 blocks
