I wonder if it is possible to send & receive funds to / from your GoDaddy account from / to an other GoDaddy account? I consider doing this, as I cannot use PayPal and find this a good alternative, as I need to register some domains. If it is possible, is there any minimal sending limit? And does this work with Dynadot, too?
Godaddy is not a merchant account. Any funds you send them will be for your own exclusive usage. However, it is possible to use the existing funds to buy domain name for others then pushing it to their account. Just not use it to pay each other as an alternative to Paypal.
Domain name registrars may allow you to pre-load your account or even get payments from the sale of your domain name through their system. But they do not have the license to do money exchanges and thus you cannot transfer funds from one account to another.