FYI I was interested if Khoros support could give me any more information about them.  Here's what they said: Based on the information I have gathered from our internal resources, "Themes" are not official OOTB community offerings; they are done through Professional Services engagements. As we at Khoros can't control them or how future feature work would impact the communities, that's the reason why we do not have them listed in the documentation ( https://community.khoros.com/t5/Community-features/About-feature-versions/ta-p/19686#U19686 ) which has details of all the OOTB features. No other information from support.   Still a mystery ... View more