E-commerce business is trend nowadays. For example, in Southeast Asia, Shopee is one of the leading e-commerce platforms. These companies are generous as they give so much discounts sponsored by the e-commerce platform and not the shop within the platform, free shipping vouchers, "Shopee coins," and "Shopee credits" to its customers. Here are my questions:

(1) Explain the business model of these e-commerce platforms in detail.

(2) How can they afford to give so much discounts sponsored by the e-commerce platform and not the shop within the platform, free shipping vouchers, "Shopee coins," and "Shopee credits" to its customers and still become profitable?