Well Reddit vs Hubski is a bit off. Reddit views upvotes as "this deserves to be in the subreddit". Or "this deserves to be in the discussion". Which in turn relates it to "I like this and want others to see it". And then to "I like this". Conversely, this means the downvote is used as a "I don't like this". This is different than what Hubski does. Hubski it seems to be more of a "show this to my friends" button. So instead of just being one little vote amongst hundreds, it's more of a personal recommendation to people who like the stuff you look at. To me, that encourages more cautiousness when choosing what to share. So personally, I found myself sharing stuff that I'd like to see my feed filled with. As with reddit, I tend to be a bit liberal with what I click. But I'm definitely trying to avoid the share=like ideology.