Because open Internet principles as understood at the time required that. Facebook used to be heavily criticized (see e.g https://www.google.com/amp/s/www.wired

Because open Internet principles as understood at the time required that. Facebook used to be heavily criticized (see e.g https://www.google.com/amp/s/www.wired.com/2007/08/open-social-net/amp https://www.google.com/amp/s/www.wired.com/2007/08/open-soci...) for locking data into their platform when it ought to be available on the open web. There was a pervasive sense that you should be able to authorize third parties to do anything you can do through the official webapp; the term “walled garden” was common for platforms that wouldn’t offer this level of control.