It's a tweet from user PC_Focus_ that states:
The next Epic Store FREE games has been leaked:
13th game: Ghostrunner
14th game: Escape Academy
15th game: 20 minutes till dawn
16th game: A plague tale innocence
17th game: Marvel's Guardians of the Galaxy
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Nothing against you, but that sounds entirely made up, given how hard it is to link different services via credentials.
Even Heroic Launcher and Playnite need you to log in before they can get that info.
Here's an article that summarized the claims and counterclaims.
https://www.pcgamer.com/epic-steam-data-reddit/
It sounds like a little of EGS not being as upfront as they should have been and a little bit of running with a misunderstanding by the Internet.
Thank you for the source!
ETA: And given how that all transpired, I can't blame people for being skeptical of capitalists' intentions.