01) After logging in to Control Panel, click Configuration >> External Sites, Stamps, and Links
Mercado Livre
Select Link Market Qualifications and edit by entering your Free Market Qualifications link
Select Display Free Market and edit TRUE to Enable
Toda Oferta
Select Link All Qualifying Offers and edit by entering your Qualification link from the All Offer
Select All Offer Display and edit TRUE to Enable
EBAY
Select Link EBAY Qualifications and edit by entering your EBAY qualification link
Select Display EBAY and edit TRUE to Enable