> Strictly speaking it would be more impressive if I created two designs, one with an aesthetically pleasing design and the call to action below the fold and on

> Strictly speaking it would be more impressive if I created two designs, one with an aesthetically pleasing design and the call to action below the fold and one with the same design but the call to action above the fold, then A/B tested them against each other. Your graphic doesn't seem to show much of anything about the effect of the fold. What is obvious to me is that your users seemed to click on buttons that were big and relevant.