I’ve never really understood it, tbh. I’ve always rounded to the nearest whole number. I don’t know why you would do anything but that. The whole “$6.99 is $6” thing makes absolutely no sense to me. I see that and immediately see $7, without even having to think about it really.

I prefer real science, thanks. You know, the kind that gets published in scientific journals and peer-reviewed, where they actually try to provide controls for what they are measuring, rather than going “trust me bro, I tried it and it’s a total game changer”.