Is it possible to use your own affiliate links? Instead of a discount you'd get 20% back as affiliate cash, and 5% back in points (10% this week). This would be slightly more than if you used your own affiliate code: 15% off, 5% back, then 5% (10% this week) of the discounted price back in points.
So a $100 item with affiliate link would get you:
$20 affiliate cash
$5 ($10 this week) in points
While an affiliate code would get you:
$5 affiliate cash
$4.25 ($8.50 this week) in points
-I'd rather play with numbers than study for finals.-