This is a marketing trick, part of the shrinkflation treadmill.
(1) Step one, make a box with three rows of cookies.
(2) Step two, make two products, one with two rows (at a slightly lower price than the three rows), and introduce a Family Size/Share Size/etc. with four rows that costs just under double.
(3) Step three, return two step one, but now with a higher price.
Repeat ad nauseum.
The thing is, as a single consumer who is trying to buy at the best price point at any given time, I’ll fall for it repeatedly.