Yeah one could publish a browser extension that hides these in-app popups, and could even be diligent over time to provide frequent updates to improve identification of such popus that are constantly diversified and need manual maintainer labor to get them all blocked. It would be cool, but i won't pay and anyway broswer extensions don't work on mobile where i spend 50% of my screen time. An alternative is to implement a vpn that proxies the OS's ssl traffic and removes popups from html content, but it has to have system trusted certificates and will break apps with certificate pinning anyway. Your only tool is to make your legislators remove popups the same way they introduced them