https://www.pcgamer.com/valve-doesnt...ng-steam-data/

Yesterday, we learned that the Epic Store client was copying a Steam user data file called localconfig.vdf
Epic CEO Tim Sweeney said that this process was a rush job designed in "the early days of Fortnite," and that it's going to be fixed. He also said that the Epic Store doesn't use the Steam API due to Epic's own user privacy concerns, not regarding Steam's API in particular, but because of a "general concern of APIs collecting more data than expected."
Valve's Doug Lombardi said that the company is "looking into what information the Epic launcher collects from Steam." It sounds like Valve isn't too pleased about the whole thing.
"The Steam Client locally saves data such as the list of games you own, your friends list and saved login tokens (similar to information stored in web browser cookies)," wrote Lombardi. "This is private user data, stored on the user's home machine and is not intended to be used by other programs or uploaded to any 3rd party service.
l'ennesima conferma che rinunciare ai giochi gratis su epic non è una brutta decisione