I really question why you guys are donating anything to Payb.tc, given that he's currently making over $9000 per week off of this. That's about $470k per year, for those of you who are bad at math.
How have you worked that out?
I don't know, but I guess the calculation goes something like this:
bitcoin max gets about 9000 BTC per week in interest.
payb.tc is on the 7.7% interest level and pays out 6.9%, so he keeps 9000 * (7.7-6.9) / 7.7 = 935 BTC per week.
935 BTC is over $9000.