I learned recently that some companies will offer to waive accrued finance charges to get you off the phone, as part of the robo-system before the human agents answer.
I assume that in this case, they can afford to do so because the finance charges were fraudulent in the first place (Hello, GAP)
Do this many times in negotiation as well typically. Even if you know you will sell (or buy) at a certain price you can't agree to quickly.
(Once again all this depends on your product, who you are selling to and what you are trying to achieve.)