I think a big part of that, for me at least, is Steam Input plus the trackpads being an actually usable alternative to using a mouse to move a cursor.
Those two features have made countless games that I never imagined I’d be playing on a controller, let alone a portable device, completely playable.
Steam Input alone is such a killer feature that I rarely see people talking about. The amount of customization you can do on a game-by-game basis is actually kind of hard to believe.
I don’t know what it is you want to distribute, but if it is newsworthy or political in nature, I think most media outlets (like “legit” ones like WaPo, NYT, etc.) have ways of contacting them through Tor for situations where the person with the information might have legitimate fears for their safety (e.g. whistleblowers).
But that’s really only for a certain type of “post.”