Usually a revenue run rate means "we extrapolated our previous short term over the next year." It's useful for rapidly-growing companies where your next three quarters are much more likely to look like your current one than the previous three.

So that would mean they're still being very economical with per-employee expenses. My guess is that a lot of those employees aren't developers, they're in other roles where the average pay is lower (support, film and video editing, administration, even some sales roles).