It doesn't surprise me all that much, as someone that works for a big tech company.

A small number of that will be IC's and managers that keep the services going, alongside people that create FOH stuff. Alongside that, they'll likely have a lot of people in data storage, data science, perhaps even research science. Put these across multiple continents and timezones, and you've likely got a few thousand.

The majority after this are likely upper management, sales and account staff (you'd be shocked at how many of these exist in media tech), and internal teams. Again, put these around the world, maybe even more so, as some account staff will work with people in local markets, so you'll have people in dozens of countries.

Operationally, they need nowhere near this amount, but if you want to achieve "growth" you need all the supporting stuff.