I’m always surprised by people who miss the point of social media; being social.
There is a definite benefit for sales people who use social media correctly, but some try to force it to be something it isn’t. I see this a lot, especially with self-published authors, or people who pay services or companies to ‘monitor and update’ their social medial channels for them. This leads to a stream of endless and impersonal links, an immediate turn-off for people who are looking to connect.