Here is a list from VegasMessageBoard that was current as recently as May 21, 2025.

The Airline boarding passes for the promos at El Cortez are limited (I think Southwest and Spirt works, others may vary).

Also, this guy's list shows some promos multiple times because he is planning to use them on different days.
I've never gone to Fremont more than 1 day, so I don't know if getting multiple promos at the same property works for sure or not.

Also, for anyone who is visiting downtown on a "coupon run", getting the Las Vegas Advisor's Member Rewards Book is a no brainer. The value of the Freeplay and Matchplay offers that are included for downtown properties easily offset the $50 cost, plus there are a handful of other coupons included that will only make the book even more valuable (for example the 2-1 buffet offer for the Palms All You Can Eat Lobster buffet!).

Good Luck, and I hope you have the same good luck that Barry Sherwood experienced the last time I was with him downtown and he seemed to hit every matchplay while I missed em all...