Yeah, Binance card teem is sly asses, now they need nothing to do to promote and pump their token. The progress of the token will depend only from popularity of the card and surly it is going to be in demand, because of - who doesn't want a cashback?!
I think that the cashback is not the only plus there, but I don't know for sure what will be the real costs of the card.
The competition usually has unrealistically bad exchange rates. The competition usually has monthly fees, or card issuance fee, or top up fees. Also the usual 3% extra Forex exchange fee for those not living in Eurozone is bad. Since Binance promises to solve (most of?) these, it's already a winner, with or without cashback. Also on Binance you'll keep your funds in crypto all the time, which most cards don't offer and many were asking for that.
I've ordered their card to see how is it going and if I'll really use the card I think that I won't get cashback, since I probably won't keep BNB for that.