I don't think the $100 is the worst of it. From what I understand though, NEXUS is a better choice for somebody who can get to a NEXUS center. $50 and from reading elsewhere it allows you to enroll in GE for no additional cost.
If you notice, your $100 didn't simply allow you to avoid being treated like a criminal. How many people were in line in front of you? Any? The maximum I've ever had in front of me has been 5. My first time, I went through it alone.
How many clerks were there? 3?
1 X-ray
1 WTMD
3 clerks
All for just you and me.
Totally worth much more than $100, but what you and I are doing is receiving the advantage of a greatly disproportionate amount of government resources - paid for by EVERYONE'S taxes. Look to your left the next time you go through, those people paid for the clerks and equipment to get you through. Your taxes and GE fee, and my taxes and NEXUS fee, didn't pay anywhere close to the full cost of that. We are receiving benefits paid for by the taxes of people on the other side of the barrier to our left.
PLUS
WHY is the entrance to Precheck at SEA behind the Elite entrance? I was an FO before I started using it (before they set it up as behind the Elite entrance in fact) and have always gotten past the dragon with no problem but why should a Kettle who's NEXUS or GE be turned away or even have to argue?
If you qualify, it has NOTHING TO DO with your relationship with the airline. It is a GOVERNMENT program.
They created it to create a class of Übermenschen among the most frequent flyers and TSA critics. They want to shut us up by giving us a special experience. I won't shut up. Don't you shut up either.