[dgb23]

Vouching systems are generally very solid if you also have some way to expell parts of your network after the fact. You need some way to slow down and curate your network or all the benefits are lost.

The benefit of these: it mimics in person interactions and describes a simple process.

But The trade off is that they only work if they grow slowly and organically, which seems to be contrary to what the crypto space is trying to do.