Pretty sure we're statistically more likely to see the number 1 than anything. Might just be a superstition, I can't say I've actually done the research.
Portnoy's list is far better, you've managed to come up with 3 sites. I have yet not encountered one in his list that hasn't paid out after you've reached the payout threshold, which can be -very- high, however that does not give you the right to call it a scam.