Originally Posted by
TRAVELSIG
It is random. There is typically a machine where you push a button and depending on the arrow you are allowed to use Pre..
Maybe for LX.
I was an fat enough idiot to fly a lot UA the last 3 months and out of 8 screenings, I got TSApre 8 times. If we assume that the chance to get pre is 1 in 5, then this should happen in 0.000256% of all passengers.
But maybe UA has the discretion to give this to their 2 Million miler victims en lieu of drinks, decent food, a bearable seat, and RDMs of any value.