This is actually a really good idea. With some motivation, we might even get "all" the wish list items done, and sooner. As for who would want to sponsor the site, it depends on the type of advertisement program. For example, if it is based on clicks, CYOA gets paid per click, or the more common one, per view. Although it might be small quantities at first, eventually it adds up. Besides, every person that checks this site 5 times per day and multiply that by 10-50 people, and you have a nice profit margin.