I had the impression Google and Amazon use the same model as Meta. But in working in the field since the 1990s I have never encountered or worked at any company that used their model. I think their model is likely superior in terms of hiring the most people in the shortest time. With the shortcoming that it might make it easy to overhire, and it might not fill the job with the best person as often.

Lots of small to massive very successful companies don't need to use their model of hiring a pool of people and then only later figuring out which role they will fill. If you're only hiring someone when you have identified a specific role and identified the correct person for that role it might take longer to hire someone, but you won't overhire as easily and you're probably more likely to have a higher hit rate in terms of getting the right person.