Before Nostr existed I created a similar protocol: #treebit This protocol was designed to thrive in mesh-networks. To prevent spam I invented #peercuration (crowd sourced filtration and propagation). Together with #opengroups this enables community building without moderators or gate keepers. The nodes you connect to and the bandwidth they use are also taken into consideration. Its a protocol based purely on incentives. You find everything here: https://github.com/baumbit Please ask me questions!