Mistake is a big word here. Maybe they figured the pandemic would provide the company opportunities it hadn’t foreseen and in order to be the first to capitalize they need to hire 30,000 people. Now those extra employees aren’t necessary, but that doesn’t mean they didn’t provide value earlier. I guess it’s a bit rude to hire someone knowing that their position will be eliminated in a few years, but that doesn’t make it a mistake, just ruthless.
Also, I block everything Facebook at the router level with unbound.