Yeah, I know how it works, my question still stands.

It's a question of risk approach. I am generally happy to allow people to use my servers/resources if I know them or if they are in my community. I guess Pubky's alternative risk approach can be recognised in its architecture. It's using semantic social, and this will be useful for community credit, as well as a bunch of other trust related stuff. Proof of the pudding will be in the eating tho.