Tech Dirt - The law was written such that the FISA court is only supposed to allow for the collection of "tangible" things (including records) if it can be shown to the court that the specific thing being collected is relevant to an investigation. The FISA Court apparently believes that means anything -- and that's the crux of the secret interpretation from the FISA Court which it and the DOJ have been refusing to reveal.
...Basically, when data collection runs up against the limits of the law, the FISA court steps in with a secret reinterpretation of the law to let intelligence officials do what they want. There are no adversarial hearings with anyone arguing the other side, and since the rulings are secret, the judges never even have to be worried about criticism.
Daily Caller - Ex NSAer William Binney: In the last year, how many requests for a warrant has the FISA court rejected? Zero. It’s just a rubber stamp. In 2002 the FISA courts found out that the FBI lied on 75 affidavits for a warrant. And they didn’t do anything as a result of that. How good of an oversight is that? It’s nothing, it’s a joke.