If you can't see value in LinkedIn you're either not looking or not in business. A global database of resumes/CVs is obviously extremely valuable.

I see the value from LinkedIn's perspective. I just don't see the value from mine. All they're really offering me is an opportunity to be spammed by even more recruiters.

And, yes, I am in business.

LinkedIn is a giant digital rolodex and works exactly because it allow me to keep my business network separate from my personal network.

I just have 2 FB accounts. One for friends, one for work and volunteer stuff.

yeah but I don't have business connections looking me up on facebook. People have very different usage of Facebok.

They look me up on Linkedin and I can see who they are and what they have done and who they know and search for relevant stuff.

I meet a lot of investors and in general people from all over the world and have been very happy with LinkedIn personally. It's the least intrusive social network I know off.

This is against Facebook's terms of service:

"You will not create more than one personal account."

https://www.facebook.com/legal/terms

I got two job offers through linkedin - anecdotal I know but it was pretty good. Job offers from companies, I mean, not just mindless recruitment agency spam.

Well done, and I appreciate that this is valuable to you. However, I am not looking for a job so it is not relevant to me.

LinkedIn is or has the potential to be the best place to post/search quality job ads (maybe not very specific IT jobs - stackoverflow is great for that).

I know a lot of people that don't look for jobs anywhere else already - spam ads are very rare.

I don't know a recruiter or hiring manager that doesn't use it. That's the sole reason I use it for when applying to new companies they can vet my experience and work history.