If this is really the case, why bother selling it? You could have earned 100 * 1.5^365 or 1.8 * 10^66 dollars in a year, assuming you started with 100$ and used it once per day, which is obviously too good to be true and you would be the richest person, ever. Stop being misleading.
I don't have a USA stripe, but if you want someone to try it with gift cards, I'll take a vouch.