And the idea of using nano transactions for upvotes has long been an attractive approach in this community for mitigating bot swarms from influencing conversations. In fact, the proof of work system that bitcoin was based on was originally proposed in the 90s as a solution to fight email spam. A micro cost of computation power (or a nano transaction) is neglegible to most legitimate users, but adds up quickly for spammers who depend on sending out thousands of emails for a single hit.