I join this before several days but Hive account@steemboost was not the first one to propose this !

https://steemit.com/powerupchain/@steemboost/power-up-live-rewards-the-power-up-chain-04

First one who post topic about power up was  Hive account@the-future

https://steemit.com/power-up/@the-future/30-days-of-100-power-up-challenge-difficult-times-call-for-difficult-measures

Thank you for the inspiration ! POWER UP !