ooof.. this chart is making my day, not because of it's content, but it's presentation. Apparently it only works if you have very different scales for x and y axis. As you have the same metrics on both of them (number of posts), it only worked if like x axis is from 1 to 10 while y axis is either log or from 1 to 100 or so. Or you choose a differnt metric for the x axis, like "share of posts about blog setups".