You choose how many points per dollar you want to offer to your buyers when they pay you with PayPal. Each point costs you 1c, and is worth 1c to the buyer – eBay don’t take anything out along the way.
For example, if you sell an item worth $500, and you offer 2 points per dollar, then the seller will receive 1000 eBay Anything points – the equivalent of $10. You only pay for the points when the buyer actually receives them, and you can offer points on as many or as few listings as you like.
Each listing you add will get a big banner below the description, saying “X Anything Points per dollar of the final price for buyers who pay with PayPal”. Buyers can click it for more information on the scheme.