Good point about the switchover from WF to Cardless, although I was thinking about using my daughter's AS Visa as the flight would be on Alaska and she'd possibly get a free bag check. But I also just chatted with Bilt support about this, and asked specifically if I could book travel for my daughter. They replied it's "non-transferable" so I would have to be the one traveling. The T&Cs are a bit vague on this. I took "non-transferable" to mean it can't apply to someone else's Bilt account.