You didn't include perhaps the most interesting part. You currently have 662k subscribers on Youtube while 1,221 subscribers on Patreon. Those numbers obviously aren't constant throughout the entire time frame of that graph, but it would generally indicate that less than 0.2% of people becoming patrons was enough to surpass the revenue from Youtube. I still have my doubts of how this scales for both consumers and Patreon as a company, but there is no question that this model is great for established content creators.