Here are some random thoughts off the top of my head in no particular order.
One problem is — which is why Martha mentioned "not constructive" —, your question is very open-ended. A bigger problem still: it's more open-ended than it need be. People will start googling for the same things you already googled for, suggesting things you already rejected, linking to forums that only discuss programming in Turbo Pascal 5.5, and only in Bulgarian. These will all be perfectly valid answers and yet not help you one bit. In short, you very likely have a number of rather specific constraints, but you mention none at all. So people tend to see this as "not constructive" or "not a real question".
Again, as Martha mentions, two years from now half the links will be dead, or point to something else entirely. So people tend to see this as "too localized".
Lastly, since this site here is not "a forum or discussion group to discuss programmatically editing English grammar and spelling in text", it also is, by definition, not the best venue to ask where else such a forum or discussion group can be found. It's like going to a site about cooking, and asking for links to forums about playing guitar. It's a safe bet that there are people around who totally can answer your question; but it's a bet nonetheless. So people tend to see such questions as "off-topic". No one will prevent you from dropping by in our chat, though, and asking there.
I have read your reasoning on the online-resource questions. I see your point. Yes, arguably every question can be deemed subjective; I'll go further myself: every question on every Q&A site ever is a straw poll of a random group of strangers off the Internet. And yes, arguably every question is too localized — English is a living language, so soon enough all answers on this site will be outdated. That much is true.
But that's too broad a definition of "subjective" or "too localized"; we can't work with that. We have to draw the line somewhere. And it just so happens that we draw it here. It's drawn but in sand, though, not set in stone. The very fact that there is an open meta question on which you could post your thoughts is indication that the exact guidelines are work in progress.