Hey, Thanks for reaching out.
"Use in an end product that is "sold" (one or multiple paying End Users)", intends to explain SAAS products, where you charge your user for your service/site usage. This is limited to one product.
If you are going to sell a product where your user has to pay recurring charges, you need to buy extended.
If you just sold a product once like eCommerce, Plus will work.
Regards,
Rakesh
Purchased a template but you gave a free template