Linkedin will do well pushing computer courses because "getting into tech" looks attractive to the 90% of people stuck in lousy jobs. They're looking to cash in on a webified version of the "bootcamp" movement. They have a great audience - people make Linkedin profiles because they are job hunting.

And anyone who takes an HTML class makes the list of profiles returned from a recruiter's search longer. And for the spam recruiters LinkedIn tends to serve, a longer list is more valuable.