I agree with the sentiment, but it depends who your customer is. Bearing in mind this will dilute to make almost ten thousand litres, it strikes me as more like a bulk OEM product ideal for people who do car washing as a business. Assuming "Average Joe" washes his car once a week using 2 gallons this would last him about 20 years. Since most people don't even wash their cars that frequently, their 20 year expenditure on car shampoo is unlikely to be of much concern. So, good deal but excessive for the average motorist.
What you're saying is, buying a cheap and inferior product is a better economy then. (Puzzeled) I would value my customer more than that, and offer the best I could. Regardless, I would offer customer education as part of my service to why measurement is better than a good glug.
8ml per 20l water is great if you know what you are at. Average Joe thinks that a grit guard is a service provided by the council when the temperatures get low. At these dilutions, with a sponge and a vehicle which almost certainly won't be prewashed, they might as well be sanding their paint. Sorry, I manufacture products that cover both cheap and expensive sectors and your average Joe is much better served with a low dilution product where they use plenty.
Great stuff, price vs dilution rate is far better than your £1 shop they are normally 1:200, 1:500 at best. This is 1900:1 so that's about 8ml / 10ml to 20ltr of water.
This shampoo is very good, a little goes a long long way! Not had it in a while but my go to snow foam is the carchem product. heat!