There definitely is some amount of expenditure by valve. I don’t know if its 30% worth. For multiplayer games they provide a server/client DDOS protection and traffic optomization service though it is opt in by the developer through an api. The other option for this tends to be a “contact sales” priced product from cloudflare. There is also some of proton’s development, some linux graphics driver work, and workshop support though I suspect hosting and content moderation expenditure there is fairly minimal.
There definitely is some amount of expenditure by valve. I don’t know if its 30% worth. For multiplayer games they provide a server/client DDOS protection and traffic optomization service though it is opt in by the developer through an api. The other option for this tends to be a “contact sales” priced product from cloudflare. There is also some of proton’s development, some linux graphics driver work, and workshop support though I suspect hosting and content moderation expenditure there is fairly minimal.