Wow, here's a new move in the "abusive GDPR wall" game:

> We are processing your request to optin/opt-out of receiving targeted ads. Your web activity will no longer be used for targeted advertising by the companies.

> This may take up to a few minutes to process.

And indeed it does! Mine is currently stuck at an indicated 45%. Perhaps this is designed to make the user go back and try again but this time accept all the tracking.