You can’t delete your profile on Betribes.
Try the contact pages: http://www.betribes.com/contact
Write them a short message, asking for account removal. Include your account details like username, password and email address.
Please note that AccountKiller.com is not associated with the business listed on this page. AccountKiller provides easy-to-understand instructions and guides on how to cancel charges and relationships from the list of businesses on our site, we have no affiliation with these businesses.