I use linked in ads to promote both my corporate internet and dealer businesses. Whereas on Google Adwords we run out of money each day, with LinkedIn ads we can't even spend $5.00 a day because no one clicks. So I can't tell you about prospecting organically, but on the pay per click side the stats are abysmal on LinkedIn. You would imagine that with all the information they have about the user (whereas google ppc demographic settings are so limited and doesn't require sign in) that it would be a great tool. If LinkedIn got a better display presentation on the ads so someone would actually click them and then provided the advertiser with the LinkedIn user, they would have a slam dunk over Google because you would know who actually visited to followup. Not sure if you were looking for info on their paid ads or not, but that's been my experience thus far. We leave it running only because it never costs us anything anyway.
