Ahh, so you're a legacy-Frontier flyer and you still got the bonus...good!

Since (at least as far as I can find) it's not spelled out in the F9 FF disclosures, perhaps to honor this perk for YX flyers for the current year they're just applying it to anyone in the merged base at this point. If that's the case, this might not be a perk which is kept going forward. But it's also fairly likely they're keeping it but have not updated things to reflect it.