If someone had asked me what it means, I would have guessed it is referring to some Friday when the US stock market collapsed (again).

I think U2 made a song about it, or was it Bloody Sunday? Close enough.

He's at the firm center.

There's currently 22 games on sale plus the 20 from the pick 5 pay $10 sale.
So that's 42 games on sale at once. That's a pretty good sale.
Also black Friday is an American thing.

Besides the two big sales going on now, we're probably just days away from the enormous December sale. What more were you expecting?

GOG always has a pretty big sale in December. Last year, almost the whole catalogue was 50% off.