The latest version of the Linkedin API has (finally) increased the post image limit from 9 to 20.
This means that if you're posting from Instagram (which is where I'm posting fun now), you may send the full 10 images that Instagram permits (or a single video), and if you're sending from Yabber or Vista (the brilliant Outlook calendar scheduling option), you may send the full 20 images. To use the Instagram option, you should ensure that you have enabled the feature in Yabber's Instagratify module and assigned a social distribution rule.
We updated Yabber as soon as the email came through - we've waited for this change for years.