The Wannas Rebate System can be seen as a type of Multi-level Marketing (MLM). When members join, they receive a code, which they can use to refer friends or provide special benefits to those who sign up with the code. The system is divided into four levels: the first level is oneself, the second level is users who joined with a first-level code, the third level is users who joined with a second-level code, and the fourth level is users who joined with a third-level code. Members can receive more benefits by recruiting more members in each level.