I notice people use this a lot and I don't know why. It was relevant but now with communities, I don't think tag matters that much unless your post doesn't belong to any community.
I have been using #ocd very often, because I was under the impression that it can stand for any type of original content.
If you want to grow your audience outside "alike-minded" people, there's an option via peakd to crosspost in OCD or other communities which might have interest in your content.
The motivation for a content creator is first the audience/like minded people for sharing content and then the rewards - so we need to focus on the communities growth.