Does transporting goods to Amazon warehouses—which exploit the presence of their products to market the forbidden "Amazon Prime" service through fast and free shipping for subscribers—constitute aiding in sin and aggression, especially since not using this method will negatively impact sales due to the logistical fees imposed by Amazon? And what is the ruling if there is a manufacturing defect in an item shipped directly from the factory to Amazon warehouses without prior inspection from me, and am I liable for this defect, even though Amazon allows the customer to return the item?

There is no objection to purchasing goods and transporting them to Amazon warehouses for storage, packaging, and shipping to customers. This is not considered cooperation in the sin present in the Prime system, because it is unintended and indirect assistance.

It does not matter that you have not inspected the goods after purchasing them, as long as you have taken possession of them before selling them by transferring them to your warehouse or Amazon's warehouse. The buyer has the option if the item is defective or does not match the agreed-upon description. If the customer finds a defect or a discrepancy in the description, he has the right to annul the sale or accept it without compensation.