I got to use the $28 restaurant credit exactly one time, last year, SFO, Yankee Pier (breakfast). It was just a salmon lox bagel and Irish coffee.
A few weeks ago, I passed Yankee Pier on the way to AMEX CL for a 1/2 hour visit (flight out of T3). They had a line and it looked fully packed inside. I was thinking, how many people were using $28 PP credits. Guess the answer was too many.
The next thing to go, AMEX might restrict SFO CL visits to people flying out of T3.