If you worked where I worked, you'd be royally pissed at the company making so much money. Every single Black Friday, the entire network would shut down in the middle of the day, for several hours. All commissions are tracked by computer. The moment the computers stop working, every single sale that goes through the system doesn't come back to you. They have absolutely no way of handling commissions when they do manual receipts.
It's not just Black Friday, either. It happens on all days surrounding Christmas, President's Day, 4th of July, New Year, and just about any other holiday sale. Magically, for some reason, a problem pops up every time that prevents people from earning commission.
And if you don't earn commission at all, then you have a perfect reason to complain about the company making so much money. The only extra money you're seeing is coming from the double-shift you're working.
That's another reason retail workers hate Black Friday. Most stores make employees work double-shifts. My old job made half of the store work from 4am to 12am the next day. If you were lucky, you'd only work from 4am to 9pm.
Then you've got the people on bathroom cleaning duty who suddenly find more and more surprises, as many customer suddenly forget how to aim for the toilet when taking a crap on Black Friday.
Really, every inconvenience that comes with everyday retail work gets amplified on Black Friday.