Because I think I would have to fight with them to get a refund and probably not be successful. Gave them a 1 star in Jegs and am just moving on.
Not worth the time and frustration. Also I'm super busy with a real estate deal I'm trying to pull off right now and my time for the car is limited. So right now my time is more valuable than trying to fight for a refund of $175.
As for flexing enough for a couple of inches of pedal travel, all I can say is that they do. It's not air and the clamping off test says it's not anything else. I've also had 2 different master cylinders on it and tested with both of them. A 1" bore and another with a 1 1/8" bore. No difference.