There is no 24 hour delay. You can stake as soon as you have enough coinage (1 Hour) But it will likely happen less often depending on your coinage and the network stake weight
As far as I know 125k coins are required.
The keys are not addresses and will not unlock any coins. They just enable the stake rate for any address in the wallet. Which is now 100% for all the prime activation keys
Any further consideration on returning the controller, delisting XPY, and try to "do the right thing" with respect to doing your part in not further supporting this fraud ?
Is your $1 investment really worth the hassle ? Are you staying firm with your investment in XPY ?