It's cool and useful--the thing is there are a ton of cool/useful apps that COULD be built on top of craigslist, but craigslist does everything in its power to

It's cool and useful--the thing is there are a ton of cool/useful apps that COULD be built on top of craigslist, but craigslist does everything in its power to prevent that from happening. Is there a reason you won't get shut down?