On that day, LinkedIn sunsetted it's Groups API, and along with it, the ability to post or retrieve content from its groups through external tools.
With LinkedIn considered to be the largest B2B social network, this change was especially concerning to B2B marketers.
My company specializes in doing inbound marketing for hi-tech companies, so our team was squarely in that group of concerned marketers.
Publishing content on LinkedIn is like broadcasting to your connections - you're speaking to everyone you're connected with, hoping that a few will like what you're saying.
As a B2B agency, we've gotten some of our best results from content shared to LinkedIn groups.
There were a lot of articles, and opinions, published in response to LinkedIn's announcement that the group sharing API was going away.