According to Foresight News, ZigZag, an order book exchange on zkSync, has announced its closure this week due to pressure from US regulatory authorities. However, the zkSync Lite exchange, which has forked ZigZag's code, has stated that it will continue to offer order book trading after ZigZag's shutdown. This development indicates a shift in the landscape of order book exchanges, with some succumbing to regulatory pressures while others adapt and continue operations.