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CAPTCHA on registration page removed quite a bit of automated registrations. What are other options to prevent/reduce automated registrations? (one from top of my head email/phone verifications)

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hidden fields will remove most of the non targeted attacks.

And if they really are targeted, I don't think CAPTCHA will help much.

Google reCAPTCHA v3 has worked pretty well for us, we saw many instances in our logs where v2 was solved by scammers on our site using some automated tools that had a 25% success rate (plenty for automated scammer scripts) but upgrading to v3 stopped all the automated attacks. So far we haven’t seen successful solves of v3 in the wild and we’re a payments company so we see a lot of attempts.

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