Feel free if you want to be included in the list of contributors to this community. Just ask at the end of your comment.The difference is that @chbartist invites people to join his "community" and they are added to the list. This is in his posts:
So people on that list have asked to be there. This is just spam here, I did nothing to get added to this list and have never had any contact that I'm aware of with this person.