Actually, you can....I asked this same thing and this is the response I got from 2CO:
Hello Mr. Sullivan,
yes you can have multiple accounts.
The 2checkout.com license is for 1 website. We will allow you to use it on more than one site OF YOUR OWN, but be aware of the following:
We only support the main site that is registered on your account.
All orders will flow thru the registered site.
Your customers may get confused on the order page to see they are purchasing from a site different than the one they were just on.
All 2checkout.com contact will be with the registered site.
You can obtain additional licenses from us, for your own use. You would sign up for a new account, pay the $49.00 enrollment fee and once you've received the new SellerID, send in a ticket thru the "contact us" link, http://www.2checkout.com/contactus.htm
with your current & new IDs, and we will credit the new account balance the $19.00 discount, for each additional license once we verify the accounts are all for your use.
Please note that the discount for accounts you are setting up for clients, or referrals, are to use your affiliate link. This pays you $9.00 per signup. Your affiliate link is here: