Practically all game publishers do. Sadly, it’s the industry standard.
(By the way, you linked Steam’s subscriber agreement, which concerns Steam’s service and client software, not the games bought on Steam. Maybe you meant to link a Valve game license?)
In any case, it doesn’t matter here, because the complaint was about Steam, not Valve.
valve is a publisher too, and they have the exact same policy for their games.
https://store.steampowered.com/subscriber_agreement
Practically all game publishers do. Sadly, it’s the industry standard.
(By the way, you linked Steam’s subscriber agreement, which concerns Steam’s service and client software, not the games bought on Steam. Maybe you meant to link a Valve game license?)
In any case, it doesn’t matter here, because the complaint was about Steam, not Valve.