A few years ago, I was working for a company that put on in-office events for mid-size and large corporations. I don't want to go into too much detail because it might become obvious about which company it was. I was an Account Executive who was responsible for sourcing deals and closing new business.
Things were a bit slow because of the summer months, so the company decided to do something it had never done before: offer a limited time discount for anybody who booked us to come in. This promotion was designed to get a bunch of people off the fence and get more commitments so we would be on track to hit our number. But there was one caveat: once the offer expired, we would not honor the discounted pricing.