Don’t forget, “recommended usage” for consumables walks a fine line between the company making sure you use enough so that the product works properly (eg 2ml of laundry detergent won’t clean a full load of muddy clothes) and wanting you to use as much as possible so you have to go out and buy a new bottle/box/tube.
Toothpaste commercials show people using over an inch of toothpaste, but the toothpaste tube says to use a pea-sized amount. Shampoo commercials show people lathering their hair with enough suds to wash a small car, but the bottle says to use a quarter-sized blob.
Or at least the packaging used to say those things, I think those have been removed, in an effort to make you purchase more. I can say with certainty that they have not been removed because it now takes more product to do the same job as less product did in the past!