Given that Alpaca violated the TOS of both services, this is not surprising.

It could also have been Stanford’s legal office trying to preempt a lawsuit, or a “friendly” email from one of the companies expressing displeasure and pointing out Stanford’s liability. So more of a veiled threat rather than an official one.

Either way, the toothpaste is out of the tube. We now know that a model’s training can essentially be copied using the model itself cheaply. Now that the team at Stanford showed it was possible, and how relatively easy it was, it will bound to be copied everywhere.