It's up to those companies if they want to go that far and sign on with GPP then, which seems fine to me. I'm not a fan of these brutal tactics on NV's part, but I can't say I have strong feelings on it. It's not illegal so it's either worth it to the vendors or it's not sufficient enough to be.

Disclaimer: I'm not really partial to any of these companies (you can hardly state anything without some fan of either coming after you). I started with a Commodore, then mostly Matrox & S3 graphics from '89 till the 3dfx Voodoo 4MB ('95), used Nvidia from 00-07 and AMD from 09-17, now I'm back on NV and kind of regretting it. Mostly because of driver issues, after a good long pretty much problem free stint on my last Radeon that lasted me a whopping 8 years. I've purchased dozens of NV cards, by the most from any vendor that I've used.

If anything, my favorite is 3dfx since seeing GLQuake in 1995 on a Voodoo card is an experience that simply can't be duplicated. Everything is a letdown and iterative since then. I'm thankful I could experience that at the time when it was a meaningful improvement. Zeus knows gameplay hasn't improved much since the 90s. But I certainly miss my nice 8 year stint of updating to each WHQL release without major issues and have zero reservations about going back to AMD.