The free dinners and gifts received from the dates obtained from online dating networks that in-turn negate your monthly enrollment fee with the network itself.
(Note: Usually females are the beneficiaries of a match rebate because it's customary for males to pay for the date.)
Ashley: So how was last night?
Megan: Good, I got a match rebate.
Ashley: Rebate? I thought they didn't give refunds?
Megan: They dont. I got a free $30 dinner from my date so my monthly membership has already paid for itself.