Networking on LinkedIn seems like a great idea. So what's the problem?
Everyone is there, either selling themselves or something. Messaging is better than email. The contact information is great. And LinkedIn provides you with an easy, 10 Step cookbook for creating brand awareness and generating leads.
The problem is, do you really think your decision makers are sitting around looking at LinkedIn all day, waiting for your content to show up? Hint: They have a job to do. That's why they're called Decision Makers.