I like this hypothesis; however, if that was indeed the original meaning, it would have more sense to advertise it as a 33% discount, or as slashing the price by 1/3. "3x cheaper" seems to be aimed to the average Joe shopping for shoes, not to a developer who knows arithmetic.
Re:OpenAI API pricing update FAQ
by umanwizard on Monday August 22, 2022 @04:40PM
(#32556904)
It's not the same thing as a 33% discount, nor slashing the price by 1/3. It's slashing the price by 2/3.
A 33% discount would be "1.5x cheaper" by my analysis.
For this item to become 3x cheaper would mean for its cheapness score to be multiplied by 3, thus 1/10 antidollars. Thus “3x cheaper” means the same thing as “price multipled by one third”.