… But have they had to scale to a degree commensurate with the amount of money they are spending? Absolutely not. The "Wikipedia has cancer" article makes that point handily.
The 21-22 annual plan [1] just shows "Technical Infrastructure" as 23.8% of "Programmatic", which is 76% of the budget, so 23.8% * 76% = 18%, or $27m.
"Technical Infrastructure" includes "all the engineering and technology" though. I'm not sure if a breakdown which includes server costs is available? I remember it being a pretty small piece of previous budgets.
… But have they had to scale to a degree commensurate with the amount of money they are spending? Absolutely not. The "Wikipedia has cancer" article makes that point handily.