The Stop Killing Games concept is not stopping or protecting anyone from buying video games.

... Neither is slapping a warning label onto games that says 'hey you don't own this the way you own a blender.'

That's very strange framing to use.

What SKG does is mandate that your purchased product be technically possible to be usable in perpetuity, or refund the cost of it.

Everyone knows servers cost money to run, so its not reasonable to mandate every game that is totally online only just have servers up forever, maintained by the publisher.

But what is also unreasonable is needless, always online DRM that shuts down one day (Games for Windows Live, anyone?) or having a massively online game that could still be enjoyed by dedicated fans, willing to front the cost for one or two servers... but cannot, because reverse engineering network code is orders of magnitude more difficult and costly than the publisher just releasing it to the public when they no longer want to officially maintain it.

SKG would completely allow you to purchase an online game whose official server support would end someday.

It... just augments consumer rights by mandating either a refund at that point, or a pretty effortless and costless release of the server files and configs.

I am really struggling to see how you are interpreting this concept as somehow preventing the purchase of games.