This is something strange that I observed about Twittad. Twittad is an advertising agency where users on Twitter sell advertising space on their Twitter profile page, and advertisers buy that space for whatever amount. The idea is not really bad. A social site like Twitter allowing this is really great! Twittad is working on an excellent platform. Plenty of users are on Twitter, so in a few days Twittad will grow like Adbrite.
Just have a look at the following image (you may need to click on it for a clearer view):
In the footer of the above image you can find contextual ads by Google. If a company can’t bring advertisers to their own site, how could they get advertisers for their publishers (Twitter users)?
Good luck to Twittad!