Just a quick update for anyone who comes across this topic: We deployed automatic javascript-based sitelock across all html5 games. It replaces your game with a banner that encourages to viewer to go directly to your itch.io page. It should help capture traffic from the sites that have been trying to steal itch.io CDN urls up until now. Thanks!
If you have an issue or any questions about it, please post here: https://itch.io/t/614172/sitelock-update