Just received an email from Google titled:
‘Migrate Google reCAPTCHA key to a Google Cloud Project by the end of 2025’
There is mention of pricing for certain levels of use.
Has anyone here received a similar email?
In my case I entered a fictitious number of assessments as 10k per month and the calculator showed $0.00 pm would be due.
I received the same email. It said this would not be enforced until the end of 2025, so I ignored it for now. They said they would send further emails later.
I’ve tested this form a bit and found that the price changes to $8/month from 10001 reviews per month.
In my case ( with a small site with very little traffic ) Google mentioned 6 reviews over 3 months so I guess it will be more a hassle than a cost 
Now curious as to whether or not Google will require credit card details to be kept on file.
Do you now how to fix this problem
I don’t. I’m going to wait until later in the year.