Why? You proved you're competent to the potential suitor by obtaining an offer. They got some valuable quality candidate interviewing experience which can be difficult to achieve, and you got a rock solid tangible improvement in your work QoL, even if the target ultimately didn't achieve their hopeful hire. Possibly they got some data that (to them) implies they should have offered more money. Win win. I would say a win for all of us because "more money".