every site or business has its own objective and not just about earning more money. DP can put one or 2 more banners and almost double the income. it was suggested to Shawn some time ago that he could introduce a sticky thread sponsorship that could give advertisers an exposure at the same time make some more money for DP but Shawn said NO.
Do you wonder why it is dot org and not dot com. Did you ever hear the founder of craigslist talking ? The guy is 100% genuine. Some people still believe doing thing for the community. Please don't spoil a great soul , don't call him crazy when he only cares and make sure his website don't end up like myspace.
I think its not a good idea to put adsense on craigslist. May be they dont want to redirect their users.
Of course.. to make money. Which they are making lots of it... They have been going strong for 5 years now.
It's been said but come on guys, just look around the site. It tells you EXACTLY how they're making money. It's pretty simple too. The main appeal of craigslist is its speed and simplicity.