Another trick is price changes by some popularity metric. Advertise 15 dollar cookies, but only charge 15 if it is after 6pm and the cookies are cold. Peak hours? That’ll be $25.
Assuming the company's main product is a hot cookie, then I take issue with this particular example, because a cold cookie is really a different product. But in general, I have no issue with peak pricing. I'm okay with you advertising a low price if it's something that a reasonable person might be able to take advantage of (e.g., I'm not okay with you advertising $15 cookies if that price only applies between 1:48 and 1:52 AM).