The Play Integrity API was never meant to detect fraudulent apps, but to make it easy for google to become the arbiter of what’s trustworthy and what’s not. They knew this of course, but this lawsuit indicates they might have something solid to stand on. Good luck GrapheneOS!
Concidentally, I only saw these captchas from hell on sites that also have their own apps. I suspect they’re trying to force you to use the app instead of the browser (while also training AIs of course).