Last week, my boyfriend and I went through the McDonald's drive thru because I wanted a soda. We saw a sign for 1 dollar large sodas, so when we got to the speaker he asked for it. The girl there said no, that was for something else. So we just chalked it up to us misunderstanding the sign and got a medium.
On the way out, we saw the sign again and saw that we hadn't been incorrect. But, whatever.
Well, this morning I went in to get some orange juice and an egg McMuffin for some sustenance before a job interview, and overheard the woman in front of me talking about large sodas. I asked if she was asking about the 1 dollar deal, she said yes, but the employee (different than the one I'd encountered) also said that didn't exist.
Only because I mentioned something, the employee called the manager over and the manager directed them to where it was on the register.
If you're going to start a deal, you should probably tell your employees!