I agree, I think the system we have now will probably lend itself quite well to growth. The combination of following tags (which does lead to the potential of Muzak-esque averaging) with following domains and people (be they power users or simply people who post/share a lot of things you like - philosopher-kings) makes Hubski a really interesting system. It's like how the user in the Reddit post descibes: James Cameron makes what he wants to make, and he is a good director (well, I won't get into that, but the example stands). We can trust the users we know/like/recognise or whatever to continue to post and share things that we like/are interested in - or even (and this is where I think the Hubski system is massively beneficial) their opinions, thus at least partly combating the averaging problem.