We are getting emails from people that share them on their public profiles.
This means those contacts are LIONs (Linkedin Open Networkers)
That said, it also works the same for Instagram and other networks, where people let other people know their email on the Bio, Description or other places where the Google crawler can get it.
Linkedin Contact information are hidden by a click, I will think on a way of adding a middleware that you can select a radiobutton to click so it can reveal more data to get it with the XPaths.
That will be useful for this kind of situation.
What do you think?