There is no proof of capacity. There is though proof of address and proof of ID with photo before you can run a NOIA node. Anybody with a computer, big or small, can run a NOIA node. The rewards are fixed for certain criteria - additional rewards.
Do you mean that we need pass the KYC for run node? I think this is not good idea, as BTC was created like free currency. And all this KYC nowdays is contradicts the main idea of crypto