Their “About” site is (just slightly) more insightful:

> Using AI-powered web search, we continuously monitor your questions and send you an email notification when the status flips to what you're waiting for.

via https://yesnotice.com/about/

Without knowing whether they actually do it that way, if you give ChatGPT the following prompt, it returns `No.`:

> Please answer the following question with just “yes” or “no”: Is the new iPhone 18 available for pre-order?