Yeah, the “converts more” is another way of saying “luring people into thinking it's cheaper than it really is”. Let's be honest: $6 and $5.99, while matematically different, is for all practicalities the same price: $6. So if it really “converts more” (and does it really or is it just a myth?) it must be because people are seeing $5.99 as cheaper than $6, when the amounts are really the same. That comes across as dishonesty in my eyes, I'm sorry.