Also relays should have bandwidth (only new notes) tiers among themselves for gossip so they share revenues.

Twitter grows by 12TB per day (probably much more nowadays). The cannot be a free tier. No relay in the world will have that much data lying around for free. People are talking about only storing motes for 30 days - but that would still be 30 x 12TB - utterly infeasible for anyone to store that muc...