In the beginning, in those first 10 guides I mention in the article, I just curated all the splintered bits of info* from the internet into one mega-guide, and added what I found after analysing fakes

* bits of info from as little as a forum thread comment, lost on page 48, to a full-blown attmept at a guide that, to me, wasn't exhaustive enough

In time, it refined to partly what I did in the beginning, and partly our own research which got better with exercise

Package all that info in a free, properly formatted guide (with some imperfect English, I admit, as we're not natives), and that gives us the traffic figures I screenshot'd