If? You mean when, because no ponzi is sustainable. So I'm calling bullshit on your claim that you will refund people back their money when you close down. That's just a straight up lie because you will already have had to use it to pay other people out and I don't imagine you're running this script so you can pay people out of your own pocket for their loss.

Public Service Announcement -
This is just another Ponzi Scam
Do Not Invest!

Those who choose to post of their participation
support or encouragement for this scam will
be tagged with negative trust for proving
they wish to help the scammers operate this
Ponzi in return for a share of the funds stolen
from other users. Thereby proving they are not
trustworthy forum members.

YOU HAVE BEEN WARNED!