Just found this repo on github. I've first read about it on LinkedIn, and in fact it really took off during the last few hours (saw 3-4 different posts on the same topic).
From what I understand the bot takes advantage of the LinkedIn job listing and it automates the application process. I'm trying just now using it, and see how it works.
The situation is fluid yet. The author and many other persons were somehow concerned about the fact that LinkedIn might ban its use.