Also, I see no reference to that on
http://www.dynadot.com/domain/api2.html or on the forums. That's still work in progress, right?
Please give it a second tough and come clear with the rules. You could use a different time delay, according to user spending.
User who spends $50 has a 5 minute delay between reg requests, user who spends $500 has .5 delay, and user who spends over $5000 has zero delay. Its clear and fair.
User who spends 9.99 (blank accounts) has infinite delay.