I play Miitomo almost every day and you get rewards for sharing two "sidekick" characters every day, I always share a SailorMoon and a SailorMars. I also add a "Moon Prism Powwah!" themed photo as a comment to each. Mostly "kid" characters say they love Sailor Moon, someone recently commented that he watches every day. Then again few adults to play Miitomo at all.
Another thing though, "I'm watching a new episode of Sailor Moon" implies Crystal, which is a show aimed at adults rather than teenagers (or children in the case of DiC/Cloverway.)
I recently gave a plug to this forum on Twitter when Sailor Samara (great SM and Disney YouTube videos if you haven't seen her) tweeted a complaint about SM Facebook groups, there were two people (not her) who complained about bullies 10 years ago who were since banned, but if more people new about this forum and that we're a friendly place (I don't know anything about bullies in the past) we'd have more activity of all ages.