1. That's Valve's prerogative, not the developer's. If they're not partnered with Valve they may not have had the option to enact pre-purchases. [1]
2. The game has no DRM and Steam preorders (in my experience) download the game files so people can play instantly on launch day. (They call it 'preloading'). For a game as highly anticipated as this, it'd likely just be cracked, leaked and pirated the moment preorders came live.
2. The game has no DRM and Steam preorders (in my experience) download the game files so people can play instantly on launch day. (They call it 'preloading'). For a game as highly anticipated as this, it'd likely just be cracked, leaked and pirated the moment preorders came live.
[1]: https://partner.steamgames.com/doc/store/prepurchase