This is a simple ponzi where u send a specific amount and you get back the 150% of the amount when the next person sends .
Min amount - 0.001 BTC
Max amount - 1.5 BTC
That doesn't sound right. What if the 1st person sends the max, and the 2nd person sends the min? How will you be able to pay 2.25 to the 1st guy when you only have a total of 1.501?
Maybe you need to clarify the rules a bit to at least make them make sense.
Also the "we always pay" bit is a little misleading - you can't *always* pay - the laws of mathematics dictate that you can't continue to pay out more than you get in indefinitely, and so there must at some point be someone who doesn't get paid.