
If the bankroll doesn't exceed the next deposit in line by the time 150 hours have passed, that deposit becomes expired, and doesn't receive a payout.
The bankroll then gets compared to the next deposit in line.
So if other people don't deposit 125% of my deposit within 150 hours, do I simply lose my deposit?
Quite simply, yes.
But really, this is where the skill in the game comes in. You must be careful to ensure you're not making too large of deposits. Additionally, attracting other investors to the website will ensure you will receive a payout.
The advantage of a system with an expiry process is that no single massive deposit can clog up the system, making it so no one else will ever receive a payout.
You must give up creating these ponzi sites, look for something honest and sustainable, you have the notion that just wrote?
say your site is a game?

This is actually considered gambling. This is way some countries allow such transparent schemes.