I have been trying to download Swift Playgrounds for almost a month now. I found it in the App store and every time I tried to install it on my iPad I got an error saying "this content is no longer available". I figured it was a bug or something and waited a few days, then a week, then I went digging on the internet when it still didn't work. I couldn't find anyone else having this same problem. One forum discussion I came across suggested that one might need to have iOS 10 Beta installed on their ipad in order to access the app. So now I have iOS 10 Beta on my ipad, and I'm getting the exact same message.
"Content no longer available"
Am I missing something? Is anyone else having this problem?