Social fission is a profit-driven business model that promotes the dissemination and sales of products through social interaction between people. In essence, fission is formed through profit-driven incentives for customers. According to the above definitions, Which of the following are not social fission:. ['After a micro-business customer selects a certain product and shares it in his social circle, after a friend helps to bargain, the customer can buy it at a low price and also promotes the product.', 'After a WeChat user purchases her favorite product, she often takes pictures and sends it in the circle of friends. Slowly everyone knows that she likes to buy high-end luxury goods.', 'After a customer of an e-commerce platform successfully purchases a product and shares its link, all clickers can get a random amount of coupons provided by the merchant.', 'A regular customer of a coffee shop can get a set coupon after participating in the "Invite friends to drink free coffee" event.']