If I am in a regular lane and someone offers me a card so I get the 'Pre' experience, that is not 'expedited screening'.

That is a 'bait-and-switch'. Pre advertises dedicated lanes, no disrobing or unpacking except for rare secondaries. Sounds a lot like GE, right?

This business of trying to intermix Pre and regular pax in one long line is a recipe for confusion and disaster - and it cheats the paid Pre customers. My experience is not 'expedited' if the people in front of me are not Pre and are busy disrobing and unpacking.

It doesn't help that there are regular, if infrequent, reports of airports forcing an entire Pre lane to unpack LGAs and laptops. People signed up for infrequent secondaries, not entire lanes arbitrarily converted to a regular experience for everyone, 'just because'.