Thanks for the suggestion. You are probably right. I see tagmask uses them. Have you noticed an effect? Community sites are always plagued by the chicken/egg problem, so removing any friction is probably worth the effort.
In the case of Hubski, a lot of the functionality comes as a result of using the site, and I think I can do better translating that to non-users. I see tagmask has a video. That's probably a good idea too.