| 摘要 |
A first user, second user, and third user are registered. Names of a first, second, and third item are stored a website for the first, second, and third users. The items can be tangible items or intangible items. The first user requests the second item. A first credit is removed from the first user and a second credit is stored for the second user when the first user receives the second item. The second user requests the third item. The second credit is removed from the second user and a third credit is stored for the third user when the second user receives the third item. The first credit, the second credit, and the third credit each represents a right to request a future swappable tangible or intangible item for the equivalent value of at least one previously swapped tangible or intangible item. |
