If people behind custodian are known, they can be regulated by state and forced to deanon their users. If they aren't known, they can rug pull more easily. I don't know exact. I just heard it

custodians mint can decide to make them known and be regulated in the same exact way, the only difference is that they cant offer a cleartext database of their clients. I think we can elaborate a better solution than state surveillance that incentivize to not rugpull.