This doesn't look like a doubler site. It is an investor site with low interest accuring so it is bound to last, so essentially it will payout to all. Just the only question would be for how long until it folds as OP is asking.
This is a hyip and we all know hyip are only for 2-3 months with whatever return they promise to give. It is more unprofitable if their interest is low because it will take more time for you to even get you ROI back.
Well it is running on 3 months now so it is bound to close down and run anytime now from what you are saying, right?
yeah don't invest, it's dangerous to scam.