I did some brief testing with another social media domain which was apparently supported at one time, according to the documentation (SocialMediaData).
Trying to use Linked in retrieved the following error messages:
It is interesting that the system is reporting an oAuth flow error about invalid consumer key. When it asked me to login, the consumer key (configured in Mma) is shown in the URL.
I do not believe that we (as users) can change this in the configuration
maybe it is exposed somewhere.