It makes perfect sense why you don't find Pinnacle at Walmart. Probably the largest hurdle as mentioned, is name recognition. At it's current price point, who is going to buy a wax that costs twice as much as Turtle Wax at Walmart, especially when they've never heard of it. Secondly, they would have to lower the price significantly to compete because for one, the average person isn't going to spend a premium for one product over another, and secondly most stores aren't going to want to stock something significantly more expensive than the rest because they run the risk of not selling any of it. Lastly, selling to large chains like a Walmart, or even smaller auto parts stores becomes a big headache. They have to ramp up production for if the stuff does sell, deal with all the headaches of dealing with a large retail establishment (my wife knows how that goes in her job), and run the risk of the whole deal falling on it's face.
So as I see it, Max is probably content to have his niche products that are thought of as the best by many in the world of detailing, and based on their pricing I'm sure he is making a tidy little profit from those that buy it.