From the Steam page:

 SteamOS + Linux
    Minimum:
        Processor: Core 2 Duo
        Memory: 8 MB RAM
        Graphics: Intel HD Graphics 4000 or other shader model 4.0

Windows
Minimum:
    OS: Microsoft Windows 10 (latest SP) 64-bit
    Processor: Intel i5 @ 3.0 GHz or higher (or AMD equivalent)
    Memory: 8 GB RAM
    Graphics: GeForce 1660 Super / Radeon RX 5600 XT / Intel B580 or higher

I lol’d.

The GPL explicitly allows redistributing without charge, even if you paid for it. If they didn’t want their program redistributed, they shouldn’t have licensed it under the GPL.

Their entire security model depends on knowing file extensions, but they still hide them. Even if you enable it, there are some extensions that still won’t show, like .lnk (shortcut file). You can absolutely have executable code, and therefore malware in a .lnk file.

And it was GPL, so it wasn’t even copyright infringement.