Thanks for the questions. With Oberlo, you can import from two sources: Aliexpress and the Oberlo marketplace. Aliexpress is a third-party website that you can import products from using the Oberlo Google Chrome extension.
Oberlo marketplace is our list of suppliers that have been vetted and reviewed. You can import these products directly from the Oberlo app.
The plan's product limits refer to the number of products, and do not refer to a specific selection. You can import from one or the other, or both for a total of 10,000 for the Basic plan and 30,000 for the Pro plan. Hope that is clear!