seems to have slowed down, because there are many investors with a small amount deposited and this seems to discourage large investor, investors will do 3 or 4 with 1.5 / 2 BTC to return to a balance of 5/7 waiting for investors.

promote the game and you'll see what come the big investors will resume the game to fly like the last few days.

PS: This is the good and the bad of a ponzi scheme .... easy money and risk of stalling

P.S. 2 the real risk of a ponzi is the sysadmin dishonest but in this ponzi has already shown that it is very correct