There’s not much distinction between currency and product is there? Most products are just other forms of currency - eg, goods can be sold back for money. Services usually save you time. So when you say product, you just mean what is time exhanged for?
The most common product of time is probably money, the next most ubiquitous type of currency. But then there are also more abstract things like enjoyment, knowledge, rest.
I feel like “See that mountain? You can go there.” was already a cliche when the game came out. [Though I have no citation to prove it.]
BotW really delivered on it though, with everything being climbable as the rule rather than the exception.