That's kinda stupid. Even if it was made for a specific card you could easily run it on most other cards. That's the magic of PC games. You're basically just asking what would happen if a dev would spend a ton of money on ingame arts. It would look great of course. But through the magic of programming every game can run on every platform.
The goal isn't to make the most beautiful game for the smallest user base. It's about making most games available to as big of a user base as possible and let them choose how good they want the game to look and run.
Just look at Skyrim. Thanks to it being on an open platform it can look extremely pretty and it didn't even cost a single cent for the devs.
If you demand respect or gratitude for your volunteer work, you're doing volunteering wrong.
