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.
Then can you tell me what is the need for space when we are running the node? from the document I read here
https://docs.noia.network/noia/noia-nodewe need a space to get the incoming data and sending it to the requester. Does not that mean we are running proof of capacity?
and what is proof of address? I did not find anything about it on the doc