Sort:  

why not remind them in their wallet to power up? Or something like when you start playing new games. They get their first reward and a tutorial will go through the different options there are explaining the implications. Not really a tutorial but overlay arrows explaining what changed in their page and what they can/should do.

Yeah a tutorial would work, but the problem is the market part before even powering up. Maybe a power up button that auto sell and+powers up?