Take on rounding

I am not often surprised but today when i got my brunch check and
looked over it there was one item that seemed odd... They added (or
more accurately subtracted) $0.02 for 'rounding'. This allowed the
total bill -after taxes- to become an round number. I guess it's
sort of nice but I don't get it because we don't specifically live in
a cash world so rounding to the nearest dime doesn't actually matter
because whether it shows $11.42 or $11.40 on my credit card statement
is irrelevant to me.
And in my case they rounded down so I got a free $0.02 but I know
myself...if they had rounded up and it cost me an extra $0.03 I'd be
pissed.
So don't do me any favors... Just give me a check for what I ordered