revenue stream for what though? I think it's just a question of what those "+1 nfts" are. I see this as another way to "proliferate the ecosystem" as per the nouns model. 10,000 pfps up at once, 1 every day forever, or what i've suggested above are all ways of doing that (maybe a community uses all three!).
I was just thinking about the potential of using +1 NFTs as a way for the community to grow beyond the collection size while adding economic incentives to the mix. As a holder of a hot collection, it could be a way to introduce new people to the community with a royalty stream on the +1 NFTs (or a social cred thing).
NFT NYC side parties were a good example of where this kind of model would help the ecosystem grow beyond the collection. An event attendee on a +1 NFT could get a taste of the community before deciding to go all in on the secondary market.