Assume that a $100 purchase is made at a store on GreenBackStreet that pays 10% to the regular free member.

Your organization receives 215% of the standard member amount.
21.5% : $21.50 on a $100 purchase

Your organization receives 115% of the standard member amount.
11.5% : $11.50 on a $100 purchase

Your organization receives 65% of the standard member amount.
6.5% : $6.50 on a $100 purchase