Correct, @focus.folks. The power up has to happen on the first (and during UTC hours to get the @hivebuzz badge) in order for it to count. Hence the "Power Up Day" name. 😊
And the minimum of 100HP to qualify for the prize pool is to help prevent people from generating new alt accounts & doing big percentage power ups to try to win the delegation prizes (which sadly happened back in the beginnings of this initiative).
The threshold had been 300HP when I took this over back in June (when @streetstyle, the originator, when AFK), but @brittandjosie told me she'd been talking to Street about lowering it to 100, to help encourage Red Fish to join in. I thought it made perfect sense, especially since she & @theterminal (a community that helps smaller accounts) have been participating in/supporting Power Up Day for ages, so I changed the minimum for July.
If you have any other questions, please feel free to shout out!