We think they're pretty reasonable.
Firstly, there's some technical restrictions about comic pages themselves:
Also, please keep the site's rules in mind when it comes to comic pages:
You can upload as many pages as you need to! We have some comics on The Duck which are over 1000 pages long.
The Duck welcomes all types of comics, including sprite and adult!
You can create multiple user accounts, so long as you are participating responsibly with them. For example, don't create fake accounts to troll people. To create multiple user accounts you'll need to sign up using different e-mail addresses for each account.
You can create as many comic accounts as you wish! It's even better if you put some pages in them for people to read. :]