I've been quite surprised to see in the comments here how many people apparently look at the feed in LinkedIn at all. I sometimes post articles on the topic I'm researching, or company-related promotion ('hey, we were on TV' or 'we're hiring') but I've always assumed that most of my contacts who are technical avoid entering the LinkedIn ecosystem unless they are specifically job-hunting, and even then, wouldn't look at the feed section, due to the amount of dross from people trying to "boost their brand."

Groups are different- though it boggles my mind that LinkedIn missed the opportunity to beat Slack on creating useful professional communities with such a head start...