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Re:Mastercard sued for $19B in Britain's biggest damages claim by grahamburger on Friday September 09, 2016 @03:51PM (#12465536)
I'll bet they would. Especially online.

Online retailers (esp small ones) are paying ~2.5-3% in credit card fees, and compete heavily on price. I run a small online store - if my credit card fees suddenly dropped by 2% the first thing I would do is drop all my prices accordingly.

Re:Mastercard sued for $19B in Britain's biggest damages claim by tracker1 on Friday September 09, 2016 @04:17PM (#12465713)
The vast majority of pricing I see online is $##.99, not $##.74, etc...
Re:Mastercard sued for $19B in Britain's biggest damages claim by usrusr on Friday September 09, 2016 @06:36PM (#12466528)
Rounding to stupid numbers (.99) works just like rounding to reasonable numbers: there are some inputs where a sub-granularity change would push the result over the threshold and others where it would not.

But your observation gave me an entirely unrelated idea: could a merchant, online or not, use deliberately random "##.74 instead of ##.99" prices to give the impression of really tight margins, even when they are actually wide?