Isn't one (or more?) of the alt cryptocurrencies about distributed bandwidth sharing? I recall something using that combo of buzzwords from 2018 or so, but I can't think of specifics.
"PacketCrypt is a bandwidth hard proof of work, this means it requires lots of bandwidth to mine. Miners collaborate with one another by sending small messages (called Announcements) and the sending of these messages requires a large amount of bandwidth."
https://docs.pkt.cash/en/latest/mining/https://pkt.cash/