[tgsovlerkhgsel]

It being a bad deal for them likely makes it a very good deal for you.

Also, letting them renege on the deal they agreed to would likely put you in a worse situation than had they not offered the (bad, for them) deal in the first place, making it harder to feel bad for them.

Ultimately, if a business made a binding agreement, letting them out of it to be nice is nice, but neither required nor financially sensible.