I should have said non-monetary. The way Amazon is using "free" the definition means that you don't pay money for it. Full stop. There are other ways of calcu

I should have said non-monetary. The way Amazon is using "free" the definition means that you don't pay money for it. Full stop. There are other ways of calculating what your "costs" are, such as including opportunity cost (what you're referring to as "time wasted." If you use that definition of "free," literally nothing is ever free, as you're always forgoing something else.