That's a knew or should have know territory - they were pushing a new feature, they lied about the impact of the new feature, they changed the industry around it and wasted billions of dollars. Later this was called "a bug" - seems beyond convenient for facebook when you know, double checking that type of thing is usually a big deal for advertisers.
Source: I was there, and tangentially involved in this
When my company made a mistake that cost our customers 750k, we fell on our sword and recouped them the cost.
We had 11k users at the time :)
I meant in terms of employees. About 4.5k in my recall, for running FB, IG and Whatsapp, as well as all of the ads products.
As other have said, they've lost court cases over it.
I'm a dev, I ship bugs all the time. When I discover one, I fix it asap, apologise to everyone, make amends if I can. Zuck did none of that.
That being said, this was a bug in the code. All of us write bugs, and so we should maybe not be as harsh to other people who do. Was it a convenient bug? Yes it was, it helped push a narrative around video and provided more videos for people on FB. Was that intentional? Almost certainly not, although they should've fixed it much, much quicker.