Sorry for being pedantic. Response wasn't directed at you specifically, but at the wider audience, some of whom might not understand the distinction. But my guess is that John Carmack does get the distinction and was intentional with his wording, although obviously I could be wrong :)

But even in advertising, there's a huge variance of ethics. I don't love targeted advertising based on my search history. I'm perfectly fine with my favorite history podcast being able to continue because of casper ads. In that case, casper isn't tracking me specifically... just assuming that history podcast listeners might be good mattress customers.