adCAPTCHA already does this:

https://adcaptcha.com

This is a joke, right? The landing page makes it seem so.

I tried the captcha in their login page and it made the entire page, including the puzzle piece slider, run at 2 fps.

My god, we do really live in 2025.

Holy shit. Opening the demo from the menu, it's like captchas and youtube ads had a baby