A few smart people I know are hardcore into Linkedin for biz dev. I've mostly looked at Linkedin as a giant spam trap. 

However, my curiously was piqued. So, I hoped on with Marti Sanchex who mentioned that he was using Linkedin succesfull (without spamming people). He shared his playbook for how he uses it to book 10+ sales calls per week. And how he used it in January (last month) to book $24k ARR of business.

Enjoy!