[TechSupportJosh]

I can imagine if they implemented something like this, you'd end up with a lot of games shipping untested Linux builds just to get reduced tax.

It'd be awesome if Valve could reward those who develop for Linux and properly support it, but it seems unlikely. At least Proton is improving regularly and is making it better in one way at least.

[Shadonototro]

Good point, but still i want to believe in developers, after all if things doesn't work, they can be sanctioned, just like they get sanctioned already if they release buggy games (they get removed from the store)