Check out this article on LinkedIn about the way around filtering spam and bot activity on your web forms, I found it quite helpful:
Hope this helps!
To me, that fake ReCAPTCHA 2 looks far worse than a real ReCAPTCHA 2. Two mutually exclusive checkboxes? I don't care if the question is purposely absurd, the UI needs to make sense.
Plus it's effortlessly fakeable if someone targets your particular form (a little human special sauce + a bot = just as much spam as before). So it doesn't actually work.
Real ReCAPTCHA 2 on a Marketo form: MktoForms2 :: reCAPTCHA. Paired with a Marketo flow and webhook, you can't fool it.