I think that no matter what you set the Weight too, the Weight will show what your account holds now. And if you add more to that account, the Weight will reflect that accordingly. So there is a need to set up a special 'node' account and fund it with 100 NXT only. Maybe someone can set up a donation fund just for that and verify that people indeed set up hallmarked nodes with the amount they received from the donation fund by looking up the IP in the peers list.
I just checked, it appears to divy up te balance base on the number of active peers. For example, I have 6 hallmarked nodes with the same account's hallmark (but different IPs in each hallmark) and 1 of the nodes sees 3 other hallmarked peers in the active peers list. since thats 4 total nodes (itself and the 3 peers) I do see my account balance split 4 ways in the balance show on each peer.
My question is, do the VPSs need to be unlocked with any particular account, or do they just need to have a good blockchain and good peers?