updated 04:05 pm EDT, Tue June 24, 2014
Apps still being rejected for pushing reviews, ratings, downloads
Apple is backtracking somewhat on an App Store policy that blocked apps "incentivizing" elements like video ads or social sharing, say sources in the video ad industry. Rejections have reportedly shrunk, and in some cases previously-removed apps have been allowed to return. Incentivizing ad views is now permitted again, as is asking users to post about an app on social networks.
What has been left off-limits are apps that offer incentives for reviews, ratings, and/or downloading other titles. These can skew rankings in the App Store, something Apple has been more diligent about controlling in recent weeks.
The clean-up efforts are likely part of a build towards iOS 8's arrival in the fall. The App Store will then get a series of major improvements, such as an improved Explore section, trending searches, and app bundles.