This have been a joke for a few years here in Brazil, we call the day "Black Fraud" (sounds a little better in Portuguese) The relevant point is that Black Friday is an "artificial" event here: we do not celebrate Thanksgiving Day so there is no need for a the stores to get rid of unsold inventory. It started just ~10 years ago when marketers began advertising it as a sales day.
Black Friday is only associated with Thanksgiving in the US because it marks just about 1 month before Christmas, but otherwise it’s not part of Thanksgiving. It’s also to start selling products for Christmas gifts — not related to getting rid of unsold inventory. Most companies have a fiscal year ending in December, so it’s mostly just about getting that last boost of sales before the end of the year.
https://www.seattletimes.com/nation-world/franklin-roosevelt...