If you look at their mining calculator then the alarm bells just keep going off. $75 per day on a $500 investment is simply not sustainable and that equates to a 54,000% APR even with simple interest(much more with compound interest).

I doubt this scam even a ponzi scheme, but rather just a classic scam. Once you deposit, you are likely just get scammed. There won't be a period of time where the admin will even bother paying out initial investors since the rate of return is just so big. Don't invest.