ÚwÙ-Passwort

Yes they are.

Then generate the steamkey(for free) and sell them elsewhere! Steam is toatally Ok with that, as long as the price is the same.

You give them a cut of the turnover on their site(steam). Important distinction. A developer can generate steam keys for free and sell them elswhere, as long as the price is the same as on steam.

DataOfDoom

Sorry to say but there are already peripherals that are blocked by anti cheat. Back when I bought Rust, i learned the hard way that their anti cheat blocks Input from the steam controller.