All PPS pools will eventually payout more than it mines if paying a 0% bonus, let alone a higher one.
There is a reason why PPS pools charge a fee and need a sizeable balance
I am confused about the first point...statistically speaking, over a period of time the luck should even out and even a PPS pool will "break even" yes?
the second point I understand...as we have experienced first hand, the pool needs to have a pretty good buffer to get over the unlucky humps