Community ranks Garnor listed in his post are based on the number of posts, accepted solutions and how long a user has been an active member of the Community.
Community members can't hide their Community page which contains links to their published and kudoed posts. However, just like any other Upwork user they can choose to make their Upwork profile private. Some do it for privacy reasons or to limit the number of invites they receive. We have no intentions to require active participants of the Community to make their profiles public.
Kudoes allow Community members to express that they like, support, appreciate or agree with a comment.