And you could indeed use Bitcoin on Steam for a while!
But then the blocks got full, fees and wait times skyrocketed, and in response to the customer backlash Steam removed Bitcoin.
Meanwhile Bitcoiners were (and still are) only focused on number go up instead of other, more productive, use cases.
Such a waste.
There's now Ethereum, Base and Solana featuring US dollar stablecoins and significantly cheaper fees. If you want to go a step further and eliminate the stablecoin issuer's counterparty risk you could even pay in the base asset of ETH. Shopify allows payments from crypto now, so Steam should try it again.
Good luck censoring purchases on ETH.
They built the lightning network, it's meant for this use case.