Does anyone knows apps that use the concept of proof-of-stake of ERC20 tokens?
For example, applications like STEEM, that uses and its STEEM POWER. "STEEM Power is what gives you influence on Steemit. The more SP you have, the more money you give to authors with an upvote as well as the greater the curation rewards you can earn. There is a very small 'interest' rate earned by holding STEEM Power." By https://www.steem.center/index.php?title=STEEM_Power_(SP)