Can users see my email address and date of birth?

No. Not ever.

Both of those pieces of information are kept completely confidential by Possibly Maybe. Both your email and date of birth are only required for sign up to ensure your a real person (not a Trojan, or virus) and to also ensure you meet the age requirements of the site (18 to 30). Once you sign up and create your profile however, you're only ever recognised by your Possibly Maybe user name.