Not sure if related, but we had this feature request at some point https://tracker.totaralms.com/browse/TS-830 which we decided not to proceed with due to security and performance issues.

I think there was a similar request from Kineo as well and I tried to explain that it is not something that we can do for a simple reason: Twitter or Facebook are one big service with a known URL and API. Totara Social is not a global installation, everyone hosts their own instance and version of the system. By pushing content into Social how would you know which system you are pushing it into? 

We also had a feature in one of the recent releases where we provide a code snippet (like widget) that people can include on their pages. This simplifies creating posts in Social by just clicking a button and opening a small window with a status update text area. This feature requires people to be in control of their 3rd party system because they need to add code to their web page. An example would be adding a "Share on Social" button on a course page for people to post when they complete the course. Or something along these lines.

Yuliya