I own more than one online store. Do I have to register for every one of them separately?
No, you don’t. Sign into your Mergado account and create a new export with data from a new online store.
Under one account you can administer an unlimited number of online stores. You pay for each of them separately, but if they are registered under one account, they will all be invoiced with one invoice. Each online store will then represent one line on the invoice, so that you know what you are paying for.