The user already registered successfully, so I was offered a solution to ensure him/her do not go through captcha trouble again when logging in on their account. I do not know of any measures for users who are trying to get registered on the forum.
That was indeed a good solution. Thank you but you know the registration process took more than 20 minutes. I never experienced with such registration process. That's why it was a terrible experience for me. Some probably will give up too.