i can tell you from my own experience and from a experience when leading a team, if they did get thru the whole process and got another solid offer, what you are buying is usually some time. from my experience when i got another offer, my then current employer matched and then extended the offer. But when the next offer came one year later i was gone. When leading the team i got a junior that said he got an offer. I got us that we could match, but we where not in the position then to offer more. And sure enough after one year he was gone.