If you have an idea of what you want before the sale starts and know how much the standard price is you can still be lucky and get a good deal. You just have to be careful not to get sucked in to a non deal.
For example, I was looking out for an Apple Watch. There is a good sale on them but they only have a limited set of body and strap combinations. I don’t want any of the straps on offer so it negates almost all of the discount as I’d be paying £50 for a strap that I wouldn’t use.
The creator did an AMA on [redacted] and said that the site was initially just a side project, so the name didn't matter. However, it started to get some traction. Then people knew it by that name, so it felt too late to change it. Now it's way too late, so that's the name
This entire comment is the perfect explanation for my issue with people getting excited over Black Friday/Prime Day. I see so many people every year excitedly saying (or at times bragging), oh I got this, I got that, and it was so cheap. But unless you were already looking at that thing you haven't saved money. You've actually spent more than you would have if it wasn't on sale.