Every once in awhile the Windows Phone Store throws a small tantrum causing apps to not be properly indexed by the system. As a result, many of you begin to think your favorite apps have been "pulled" or "deleted" or "removed" from the Store, all due to some mysterious reason.
As it turns out, nine times out of ten the apps are still there, accessible via a direct Store link. Very rarely are apps actually removed. Case in point, Skype, Vine, and Rudy Huyn's apps are all still alive and well on the Store.