Reddit basically has the exact same behavior -- with deeply engaged user bases around each external link talking about it and forming rather cohesive &quot;communities&quot; around each topic...<p>Yet they have a tough time monetizing that.<p>Why hasn&#x27;t a twitter or a reddit sought to get rev share from the traffic they drive from the resultant pages? (I don&#x27;t know enough about adrev&#x2F;rev-share to know if this would work) -- but reddit and twitter know exactly how many people click on each link.<p>One thing I would like to know is the diff in % of users that click into a comments session without ever clicking on the actual link. I know that I do this as amajority of the way I read reddit and HN even. I get the gist from the title, some additional details from the comments and sometimes other, better links from users as well as commentary, corrections or what not.<p>I also upvote an extremely few number of posts and stories. How many times have I clicked a link or read comments about a post without ever upvoting or down voting it? Probably about 90%