Some USSOCOM units(there are numerous units under the command) are in the public eye(may only be portions of the unit that are public, not other parts), others are not in the public eye/media. The US Military has great PR, and is active on social media, support to Hollywood, etc. Out of the numerous people serving/served within USSOCOM it is probably only a small percentage that actually write books, etc.
CSOR is the "public face" of CANSOFCOM, so there are media and CF reports(operations and training) on them, photos, and they have been at public events, etc. Plus the command recently released a PR video showing off all the units.