These Q&A sites are doing a bang up job at nailing page one of a relevant Google search without too much effort.
Question title goes in the web address, the title tag, meta tag, H1 tag, and with a few inbound links, bingo, it ends up on the first page of a Google search real easy.
I know about CTR and CPI but I'm wondering if one could sell banner space similar to how it's done on Stack Overflow based on Google search results alone?
For example, someone on Cooking writes a question titled "cooking classes manhattan."
According to Google's keyword tool, that magic phrase gets 720 monthly searches under medium competition.
If that question ends up on the first page of Google search for that phrase, could someone sell a banner ad to a cooking school in New York for say a set fee per month?
How about allowing them to continue to do that for every keyword phrase/question title that ends up on page one of a Google search result?