Bitcoin was not much in the public consciousness by then. It was trading at ~$10, mainly on MTGOX. It's likely its transaction volume was much lower than other non-crypto digital assets (and MTG cards) at the time.
You claiming that Valve hired an economist to study digital scarcity, not because of Valve's booming ingame economies, but because Bitcoin was at $10. Sure.
No, I want to insist on Bitcoin's intellectual legacy. Before ~2011, only a handful of niche nerds at the intersection of cryptography and (goldbug) economics had heard of related ideas. After ~2011, everybody had, and started building their own (like Etherium).