why can't we subscribe to a set of tags, like "help" and "steemit". That way we can see all who wants help related to steemit, or close to it. Also, I want to subscribe to "augmented reality" and "news". The set of tags helps to isolate posts and will be a community around that. Also, tags should be traceable, so for example "samsung" should be traceable to "org:Samsung Group". We should have a blockchain where we can register tags. Also, tags should be able to contain spaces; to have really advanced tags.