I have recently moved to Cambodia. I never pay with cash. Even for a single beer, typically $1. Every place, including street vendors, have a QR. Always free.
If the data is deleted after use that would mean you would have to queue up at the airline counter every time. That would seem to take a much longer time than before.
My last trip was Airasia dmk to sai. I bypassed the airline all together with my boarding pass on my phone. Then 5 minutes at passport control.
Can't be much faster than that.
I don't mind the fees so much, it is the customs PO can be very far away.
I recently ordered some pharmaceuticals from the UK and delivered from India. There was no fee listed with the notice. I made the one and half hour trip only to find that it was a holiday. I contacted the seller and they imediately reshiped. That one was received with no issues.
Just remember the old saying "you can take the girl out of the bar but you can't take the bar out of the girl".
And for me I draw the line at any girl who has had sex with more than 5000 partners.