Currently there is an ad for a "Free entree" from PF Chang's under "Sponsored Links" on right side of Chowhound home page. It states "Complimentary Xiao Huo grill entree.". It's followed by link to PF Chang's website where there is nothing about the free entree. I called the local Chang's and got the explanation that they mailed cards for a free entree to "randomly selected households" and that unless I had a card, I was not eligible. I didn't press the issue.
So, not false advertising but misleading.
Just thought some Chowhounds and those that run this site would want to know.