According to an email sent to developers, Apple has stated that it is going to start removing old and outdated apps from the App Store. Including apps that haven't been updated in a while and apps that have been abandoned by their developers. "We are implemending and ongoing process of evaluating apps, removing apps that no longer function as intended, don't follow current review guidelines, or are outdated," - Apple (in the email) In order to combat some search engine optimization, Apple is also making naming guidelines stricter by not allowing apps to have names longer than 50...
Source: http://www.gsmarena.com/apple_will_remove_outdated_and_unmaintained_apps_from_the_app_store-news-20289.php