Comment by missinglugnut

The percentage change is the same for everyone. If a consumer pays 10.05 instead of 10.03, they pay 0.2% more.

If a store games prices to charge 0.2% more on a million transactions it's still 0.2% for them. Except the rounding on multi-item purchases isnt predictable so it would probably take a miracle of data engineering and behavioral science to hit 0.1% benefit on average.

Meanwhile stores are using 30% off coupons and buy on get one free to get people in the door, whilst hiding double digit price increases.

Worrying about the two pennies is stupid on either side of the transaction. Don't listen to the professional complainers.