With all the variation that has sprung up around internet memes, there was bound to come a time when someone would finally organize them into one, easy-to-use chart. Now, the creation of deviantArt user OohLaLa423 doesn’t cover every possible permutation, nor every trend, but it is big. Really big. It’s also conveniently organized, showing the progression on the vertical axis, and when possible, grouping them by type.
At least, I think that’s what’s going on.