Exactly. Nobody I know ever uses it for anything *but* that.
Especially in certain parts of the IT industry. Keeping track of the ridiculous number of people you work with is impossible. Having a nice list - even if it spams your inbox with recruitment crap while you're not actively seeking employment opportunities - is a damned handy thing to have if you find yourself in a position to actually need to look for a job.
I'm not for sure why any employer or anyone else trusts or cares about linkedin especially in the IT field.
Most of the people on my linkedin profile who have vouched for my computer knowledge know nothing about
computers. They've said I'm an expert at java, php, and any other language that linkedin suggests even
if I know absolutely nothing about said language. To them it's all the same and it makes my linkedin profile
utterly useless as I'm ranked higher in languages I don't know than I am in languages I actually do.