ReCaptcha is very high friction for many users, particularly those not logged into Google services For example I have never reached the end of their 'identify

ReCaptcha is very high friction for many users, particularly those not logged into Google services For example I have never reached the end of their 'identify the road signs' challenge and if I encounter a site that uses them I'll just close the tab. Even Google Search. Much better to use rotating series of questions related to your domain of data.