“Specifically, Google made AMP unable to execute JavaScript in the header, which frustrated publishers’ use of header bidding.”
The updated Texas complaint says Sandberg negotiated the Jedi Blue deal and Pichai personally signed off. Facebook got to win auctions even when outbid. Remember that AMP was sold as a speed project for the mobile web. According to the complaint, it was also a way to kill the header bidding that let publishers get competing bids.