If I tell you: I want you to give me $5 and I won't give it back, but it's up to you whether to give it to me or not, is that stealing?
See the rules that you created so that your site ponzi not to collapse and become scam
Based on your logic you are being honest with members to inform them the rules, right?
This all websites make their through the TOS
You say that the system is reset one day a week and including the time say that the system will do the reset
But at the same time say how ponzi scheme and that the former has higher priority than the last
Your site has not statistical and you profit 5%
You think your site is a game?
If you reset and says some can not receive, you are manipulating the game to your personal pleasure and say more .... with this you keep the money of the people and these people can not complain because you explained the absurd rules
No one will know whether or not the last person to invest and even if that person know you can handle.
My advice:
Not be insisting on something that will harm other people, if you've been ripped off by scammers as you say, do not become another scammer to steal other people