At any reasonable estimate of Valve's revenue and valuation multiples, they're easily a billion dollar company, I'd be surprised if it was as low as only $1B. They have nearly 500 employees listed on LinkedIn[1] which is probably a decent estimate given people who've left but haven't updated their profiles and those without profiles in the first place. That's not a small company by any stretch, and I think we can all agree they're purposefully making the decision to not offer competent support.
I don't know about all of them, but do you realize that we are talking about 1B$ ACTUAL revenue in current dollars of sales, not valuation ? These are two very different things.
[1] - https://www.linkedin.com/company/13922?trk=tyah&trkInfo=clic...