The line "Receive a $10 Reward Certificate for Every $10 you earn!" has an implication of a 2-for-1 deal. From this marketer's standpoint, it feels more like sophomoric Copywriting by Committee than something intentionally misleading. It's as if the original subhead was "Receive savings for your earnings", then an in-house lawyer or reviewing required it to be disclosed as a '$10 reward', because the savings are only in $10 increments then another lawyer required it to be called a 'reward certificate' to align with the definitions.