SLS doesn't understand the word "Complimentary"

I received an email from SLS with the headline "Complimentary Room Nights for April and May?". I thought, nice deal, but when I opened the email it gave me a code to get 50% off the room rate. LOL There were no complimentary room nights on the calendar. Next time I go there, I will have to bring them a dictionary to show them the meaning of the word Complimentary.

Got the same thing on a Venetian mailer last month.

Vegas has the same problem with the word "resort".

However the word "fee" they seem to understand all too well.