A) A tenth of a cent on a 3 dollar item is pretty far off in scale from up to 24 cents (or 12 if nearest rounding) on a 1 dollar one cent item.
B) Correct, 99 cents would be more likely, which would make the problem worse.
I don't see "prices could go up" as a selling point either (I doubt they'd want to round down unless it let them out of sales tax). How would raising prices to make change differently benefit either of us when you can already pretend to live in your ideal world by just telling places to keep the small change?
Some cashiers hate it when I tell them to keep the change. It throws their count off later if they put it in the register, and they have to count it out themselves if they want to keep it.
B) Correct, 99 cents would be more likely, which would make the problem worse.
I don't see "prices could go up" as a selling point either (I doubt they'd want to round down unless it let them out of sales tax). How would raising prices to make change differently benefit either of us when you can already pretend to live in your ideal world by just telling places to keep the small change?