The lucky people (not me) kept coins untouched in their wallet for many days.
25,000% POS is more than 68% daily increase.
The lucky people accumulated coinage even over the lower POS phase.
For example, If I had 100,000 PX and locked my wallet for 5 days before HIPOS, I would get:
100,000 x (1.68) x (1.68) x (1.68) x (1.68) x (1.68) = 1,338,2782 PEX.
This is exactly what the lucky person did.
Coinage was accumulated over the entire time, which was utilized in the HIPOS PHASE.