Yeah if you are running a legitimate business, you probably want to comply when the FBI hits you with a subpoena!
It will be interesting to see if more details come out about this.
What did KAT have to do with Bitcoin? Were they taking some payments or making some payments in BTC?
The alleged owner of KAT was using bitcoins and coinbase wallet. In some article, it was said that he did 42 transactions with it and if I remember correctly, he was buying songs on iTunes or some place.
It's ironic, isn't it? He owns a piracy site, yet choose to pay for songs, and when he did that, he wasn't even hiding his IP. It felt like he was trying to get himself arrested at all.