So if it was $1.99 you wouldn't say 2 bucks??!@#$%^&
The thing is, when measured diagonally, the difference of 0.5" matters more with each subsequent inch. Consider the price difference between 22" and 24" monitors, then consider that they're screwing you out of 1/4 of that when they round up. Not to mention that a 16:9 monitor is actually fewer square inches than a 16:10 monitor of equal diagonal measurement.