Quixotic is the largest NFT marketplace on Optimism, a layer 2 Ethereum network. Despite being the largest marketplace on the network, it still does fairly little in volume compared to NFT marketplaces on other networks, boasting only around $420,000 in trading volume in the last 30 days.
Quixotic paused marketplace activity after discovering the hack, and promised to reimburse all users who had tokens stolen from them.