This month my search costs tripled and my “no results” rate jumped to 97%. Nearly all the search traffic is coming from Microsoft, and tons of queries are completely unrelated to my service. Best I can guess this is Copilot. It seems to be using my engine as a source whenever it classifies a query as gaming-related.
So I added a referer requirement, and that stopped the traffic. Though it’s trivial to defeat if somebody wants to.
