I could post in the forum that I'm purple with pink polka dots. It doesn't make it true.
Let's do the math, shall we?
From Digital's Advertising page:
5 cents solo email to all only $18. They have about 28,000 members.
If someone buys one of these ads they only have to pay enough to cover the cost for 360 clicks on the ad.

If only 10% of the members (2,800) clicked this mail it would cost the program $140 just to pay them, never mind the referral earnings it generates.
The amount they're charging for the ad doesn't even come close to being enough to pay 10% of their members. Do you really think you have any chance of being paid when they're obviously not taking in anywhere near the amount of money they need to pay people?