I was emailed a lucrative job position through LinkedIn

[iemanja]

7. If that job is still available

You could always apply and if you get it use the offer to get a retention raise. They won’t meet the salary, but they could well give you a wage bump.

And there is legitimate recruitment on LinkedIn in. I was approached that way, but the job didn’t meet my salary expectations. A work colleague was given an offer that she used to get a retention raise. She told me a few months later, and I successfully applied for an equity raise.