Are there any limits to what you provide?
The retail pricing is:
* There is a bandwidth limitation per domain per year of 200
megabytes of total data transferred through our servers. Usage that
counts towards your quota includes bytes transferred during DNS
queries, delivery of parked home pages, delivery of URL forwarding
information, and delivery of forwarded e-mails. If you do not use
WebPark, WebForward and MailForward, then only DNS queries will
count towards your total usage.
If a single domain goes over 200 MB of transfer during a year, then
it counts as TWO domains, if it goes over 400MB, then it counts as
three, etc. Usually DNS hits are cached, so even the busiest sites
won't go over the 200 MB limit. 200 MB should get you about
1,000,000 DNS queries. A typical site uses 5 MB per year of DNS
bandwidth.
There is no limit to the number of subdomains or records that your
zone may contain.