It’s not Curve’s fault as remember Airtime Rewards tracks your transaction to make the award. Curve is a card that then links to your original card for transactions. I think that Airtime Rewards quite rightly would have to do a lot of work to untangle that for not much benefit.
Or maybe they just don’t want to accept Curve cards it could be just that simple.
The official answer says they don’t support transactions made “through” Curve cards - maybe that means that if you register your underlying card with airtime and pay via Curve, it won’t track (which would make sense, as in that case Curve is the merchant). I registered my Curve card itself, not the underlying card, and it works fine.
Do you know, I had to read this a few times before I realised what you were saying, but yes - I think you’re right. I interpreted the official answer as referring to using the physical Curve card itself, but your interpretation makes more sense.
Anyway, while the official answer is “no we don’t support transactions via Curve cards” I also registered my Curve card itself when I first joined Airtime Rewards and have used it numerous times since - never had a problem, either using the Curve card itself or Google Pay with Curve as the selected card.