One of bitcoins (and Directbets) main features is anonymity.
Why do I have to send an e-mail to claim a reward?
If I reach the highest tier I have to send 11 e-mails in a single month to your service!
Thanks for your suggestion.
There are some challenges in automating the VIP rewards in the way that you suggest because unlike a typical Sportsbook, there are no accounts at DirectBet.
If you do not wish to reveal your e-mail address you can alternatively claim your VIP rewards by sending me a private message here on Bitcointalk. We do have clients who do just that.
Starting in February we added more milestone rewards in response to clients feedback, but if you prefer you can claim all your rewards at once at the end of each month. You might find it more convenient than claiming each reward separately.