It happens every time there is a high volatility selloff like today; they're known for it. GDAX is one of the most unreliable exchanges for trading volatility. Kraken is also among the worst.

Having said that, there was a concerted DDOS attack on exchanges that preceded this selloff. I believe these attacks are profitable because they cause panic selling into thin liquidity.


That case is the IRS going after Coinbase's customers. They claim that Coinbase is being used to evade taxes and went on a fishing expedition, asking for virtually all customer information. Their request was denied by the courts, but the revised request (limited to customers w/ $20,000 or more in activity in one year) has apparently been approved.