That itself is false too with a quick look at isthereanydeals showing lot of steam games being sold cheaper outside of the steam store.
Even the Steam key guidelines don’t explicitly state that steam keys can’t be sold cheaper.
It’s OK to run a discount for Steam Keys on different stores at different times as long as you plan to give a comparable offer to Steam customers within a reasonable amount of time.
partner.steamgames.com/doc/features/keys
Key word being comparable which is why if you are a user of isthereanydeals or /r/gamedeals you’ve likely gotten most of your steam games from outside the official Steam store.
I think some people just assume Steam sales must be the cheapest and don’t look beyond it.
I am puzzled why people believe Steam keys can’t be sold outside Steam unless they never looked outside the Steam store.
This is one example of a game that isnt too old.
isthereanydeal.com/game/silent-hill-f/info/
Historical low is $31.49 from Fanatical and Steam low is $41.99
Nibodhika@lemmy.world 4 hours ago
Sure, but that’s more about Valve not pursuing violations than anything else (in other comment I also mentioned how they turn a blind eye to Humble Bundle as well). But legally they could go after silent hill f and demand it be sold for a similar value to $31.49 since some time has passed and stem users have not been offered a comparable offer. I think what’s in the clause they make people sign is more important than whether they enforce it or not, because if it was about price parity with other stores then it would be abusive (even if they didn’t enforced it always), but if it is about selling something they provide then it’s not abusive even if they do enforced it always.