> Now it seems it is OK to ship a binary blob driver that links against Linux driver apis. Nvidia, ati,

Several copyright holders in the kernel are on the record that what Nvidia is doing is not ok. Linus himself is known for some harsh words.

In theory you only need one who is willing to put up a fight. Your business model should not depend on winning a court case concerning the actual license as it is put in print. It should be based on you not going to court at all, by not doing things against the copyright holders wishes.