Example Question for Example.SE:
Is Foo better than Bar?
Yes, go with it (I like Foo a lot!). Be sure to try Baz too, by the way.
Now, it's obvious that this wouldn't take much to get closed as "not a real proposal", and said to be "unfit" because it is not "productive", "useful", etc., and even said to not be a question and an answer (altough, by the dictionary, they are).
Now, I'd like to get this straight. This unspoken rule is solely because subjective questions and answers do not generate much traffic from search engines and thus do not mean a profitable place to have ads on?
I'd like that to be clear, in such a case, and have a close reason along the lines of "closed as not profitable", and "this proposal would not be profitable to the site's owners for not showing enough SEO potential".