"Fee rebate" refers to a partial or full refund of a fee that has been paid. It means that you get some or all of your money back that you initially paid as a fee. Full definition
A one time annual fee rebate for you (the primary cardholder) and up to three authorized users added at the time of the application. (cibc.com)
You can offer prospective investors fee rebates for new fund support, initial fund fee waivers, or perhaps a low fee founders class. (wexboy.wordpress.com)
If you are approved for that card, this annual fee rebate offer will apply in the amount of the annual fee, if any, of the alternate card. (cibc.com)