What is the “full measure of sin?”

What exactly are we being charged for?

... for the iniquity of the Amorites is not yet full [Gen. 15:16].
Fill ye up then the measure of your fathers [Mt. 23:32].

It would appear that this is a so-called “sale of indulgences” where we are not fully permitted to “enjoy” in a legal sense or make use of what we have bought and paid for.

Everything we purchase, whether tools for hard work or luxury goods for pleasure and ease, is bought at a price of the time and effort expended to make the money or a sacrifice of what else we could have bought for the same money.

Preachers have said sin is punished when it has reached its full measure. There is apparently a liquor store open on Sunday where you get the full quantity, proof and brand name quality of liquor you pay the full price for, whatever the posted price or sale offer is. Maybe that’s money I could have spent on something else, or bought a non-alcholic beverage instead, (if it is indeed the case I would have bought the liquor,) but all I know is that I didn’t drink the liquor I was charged for, and I don’t have it in my possession now either.