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Do I have to apply for all merchants participating in Shop explicitely?
From Wiki.zanox.com
After the confirmation of your application for the partner program Shop@ you are automatically partner for all participating merchants. You will receive all commissions of the participating merchants even if you are not a partner of the merchant outside Shop@. The commission model can be viewed online at any time within your “Programm Manager”. In the columns “Commissions” click “indirect” to go to the overview of the commission models.