Jimmy Wales wrote:
On this page: http://en.wikipedia.org/wiki/Wikipedia:List_of_Wikipedia_articles_based_upon...
we have a link to http://www.questia.com/
Questia has offered to pay us $12 per signup through that link, but we would have to change the link to a tracking url.
Sorry I'm replying to such an old message, but ... why can't they just use the HTTP Referer header?