So what about this hidden immunity idol deal.
Let's say it's 3 a.m. and everyone's asleep but me
I'm here, armed with 20-25 write-ups, and I eliminate Cirie and then eliminate 15 other people.
Several hours later, somebody wakes up and sees Cirie is eliminated and wants to use their idol: wouldn't it be too late to use the idol to save Cirie? Otherwise someone could just wait like 50 eliminations before saying "oh yeah I want to save that person way back when".
EDIT: okay just saw the 24 hour rule. I guess it'd be advantageous to wait 23:59 before saving the person.