I found this site www.how-to-learn-english.net with an interesting feature on the upper-left side with a link named "English as a Second Language" that when clicked generates ads for that keyword. The same can be done for any keyword as I changed it on the address bar for other ones and worked perfectly.
Where can I get those ads to be placed on my site? Google, Yahoo, AdBrite?
That site is not a top performer (Alexa 2.5 million) so I suppose it is not getting any special treatment from the big ones since there is no mention of who is providing those ads.
I suspect it's this company reading the source code. Their website isn't that well organized though, multiple broken links (404 Not Found).
And this company could also be providing that feature but through their parking program which you can apply for if your domains:
I'm very much interested as well how to implement this feature and if it's solely for parked domains.
I found out that the company is Dotzup.com (via a broken link, too) since they have other sites just like the one I mentioned.
Appears to be a good feature, seems to encourage clicks, but they do not accept international domains (I have many .CAs). They may accept .ORGs and .NETs in some cases but not sure. They are specially good with typos as well.
If I could place ads just they did, in that fomat and specially size, I would get a script like that myself. But the most important is the ads feed, which it seems they are getting it from Yahoo, and Yahoo does not accept foreign traffic at this moment. Google with their tiny, miuscule size is not an option.
In case anyone has an alternative for that, please let us know.