Adobe Mercury Playback NVIDIA only Legality

I never really considered AMD video cards until I found out the 7970 is roughtly 10x faster on Open CL performance than the 680GTX (due to Nvidia's self castration of these cards so they can sell their over priced Quadros).
Which brought me to the realisation, isn't it actually illegal to form alliances such as the Nvidia / Adobe one to push out competition? Clearly it is possible to get mercury playback to operate fine on AMD cards, as they support them for macbooks. It is akin to price fixing between suppliers... and monopolistic practices.
I'm not a lawyer though, so maybe I'm wrong. All I know is, this whole Nvida Quadro only garbage with adobe products and gaming card castration is beginning to get on my nerves. Is it too much to ask for a decent video card for 3d work and video work for under $1000?