Doing a job. Doing it well. Catching the eye of a bigger/better company. Getting a lucrative career-enhancing offer from that bigger/better company.
It's not rocket science this stuff, is it?
There are a lot of things I'm not interested in right now, and I'd be absolutely telling you the truth if I listed them.
Should someone come along with enough money, then I'd change my mind on some of them. It doesn't mean I was lying when I said I wasn't interested previously.