To confirm whether Amazon provides advertising subsidies, you can use the following steps to determine.

First, create an advertising campaign on the Amazon advertising platform and set a budget.

Then, monitor the performance of the advertising campaign, including indicators such as click-through rate, conversion rate, and sales. If the performance of the advertising campaign exceeds expectations, it may indicate that Amazon provides advertising subsidies.

In addition, you can contact Amazon's account manager or advertising support team to find out if there are any promotions or discounts that apply to advertising costs.