I got two small gigs & had about 150 connections, all or most of them people whom I personally knew. But none, I felt did anything useful professionally, apart aniversary wishing at office jobs. Linkedin might be useful someday in the future as 'remote' is picking up, but I do not like spending time there & hence closed my linkedin account & chose a lighter online CV which do not spam me with unwanted group postings. And I also feel that post linkedin I am taking less advise of experts, which in some way is boosting my morale!