I was told by a recruiter that linkedin charges huge fees ($10k+) to recruiters.
Fake? Sure, but enormously profitable ... to microsoft.
So first they get you to supply all of your data, your friend's and colleague's dat, then they want to charge you a monthly fee to be "in"
But wait, there's more! Then comes the fees to actual recruiters.
L/I would be members, do an AI or wiki search for "fool's paradise" and don't forget to check reddit's "linkedin lunatics" for a good laugh.
I got recruited there once. Biggest career mistake of my life.