[AnthonyMouse]

What you could do is, use both. One sign up from each IP per day before you get a CAPTCHA. Then you're not subjecting 99% of your users to training Google's AI for free but the people at a cafe in Bangladesh can still sign up.

[xeromal]

This sounds like extra work to solve the problem you said didn't exist.

[AnthonyMouse]

It's extra work because it's better. You're not subjecting 99% of your users to training Google's AI for free.