I read the title and detected a bit of outrage. But really, I think this is great. If we want resources like this to exist, somehow they will eventually have to make money. Ads aren't going to work here, but this might. So it seems fine to me.

(Actually, I have no use for LinkedIn, so I don't even have a profile. If I want to get a job or hire someone, I have other resources available. I believe they are called "friends".)