A lot of SSI is about delegating Sybil-resistance. Websites use Google or Facebook sign-on not just because it's more convenient for users, but also because sig

A lot of SSI is about delegating Sybil-resistance. Websites use Google or Facebook sign-on not just because it's more convenient for users, but also because signing up many accounts on these services is a bore, thus managing spam. If the sign-up process was as difficult for the small services as it is with Google or Facebook, users would give up. But users already have Google/FB accounts or know it's worth it to have one, so they don't mind the process for Google/FB. For now, there's no accepted standard identity mechanism attaching to ETH wallets. It's not a trivial problem either. If while reading this you just had some idea how to quickly solve it, chances are someone had it before and it's vulnerable to either centralized control or user abuse. ENS might work at deterring spam but it's way too restrictive for now.