They are, however, subject to change regularly and are often sent out in emails or via SMS. With that said, some bingo sites do provide extra treats for existing customers with exclusive bonus codes. By this we mean, if you are not a member of the bingo site in question, you will get some additional freebies when you sign-up and make your first deposit. The bonus and promo codes featured on this page are primarily for new customers. Frequently Asked Questions Can existing customers use bingo bonus codes?