MBTI test is not something that is popular and known all over the world.
And it is not recommended to publish the full date of birth on the Internet, since such personal data is used by scammers or to hack accounts, email, and so on. In such situations, it is enough to ask the age. Why do you need a full date of birth? Check compatibility by horoscope?
For me, the most important thing is the candidate's portfolio. If it suits me, I will ask for other information.