Normally, there is no subsidy. Because Amazon is a commercial company, not a government agency or academic institution, there is no legal obligation to provide subsidies for registering on Amazon. In addition, even if there are some forms of subsidies, they are usually only preferential policies for specific regions or specific groups of people, and not for all members. However, after registering as an Amazon member, if there are frequent subsidies such as preferential activities or using various services under Amazon, you can also save money in many aspects, which is equivalent to an indirect "subsidy".