@alex: Perhaps you should take a gander at those Pontiac-related websites yourself, and get a feel for them. Just because not everyone posts on a regular basis like you and I, doesn’t mean that they no longer care for Pontiac, or wouldn’t purchase a new one if the brand were revived. Furthermore, obviously: It wouldn’t be ONLY the members of those websites who would “actually buy a Pontiac.” It’s ridiculous to assume that no one aside from those members would purchase a Pontiac.
“It simply proves that people raised the issue before.” What does it tell us, when that many people “raised the issue before”? And again, those are ONLY the potential Pontiac buyers who became members.
I take you at your word that you’ve watched GM like a hawk. Does that mean others, on other websites, haven’t?