I do agree with your opinion that Linked In is one of the leading professional social networking website, and it helps a lot to the all type business online. In this online era most of the business owners want to target their prospective customers through the Linked In by providing different offers which create more and more leads.
Secondly, Linked In is widely acceptable by all people which helps business owners to campaign through online. Like other social networking website Linked In also offers a wide range of services that assist business owners to trigger their online marketing strategy, and get touched with their targeted audience easily.
Have a great day !