In the 15 months since I last reported (here) on Israel’s CleanCoin, the number of registered app users has grown to 100,000. As a reward for reporting or clearing up trash, they receive tokens (coins) that can be redeemed at some 60 Israeli businesses. The idea has spread to NYC, the UK, and Canada.
https://www.israel21c.org/crowd-cleaning-app-pays-people-to-pick-up-litter/