When we go to the supermarket or a bookstore or a hotel, we are often offered a "Point Card", where you can accumulate a number of points according to the amount of money that you paid. Then the supermarkets or bookstores or hotels will periodically release reward programs to give discount or gift to "Point cardholders" to encourage them to buy more.

However, when this kind of cards become more and more in our wallets, we may find it more and more difficult to always take them with us. Therefore, in the end, we may refuse to accept a new "Point card" because we can find a new place for it.

So, why not create a new card---Just-One Card---to substitute the dozens of cards. We can create a membership society and invite supermarkets, bookstores, hotels and airline companies to join the society, so that their customers can use this Just-One Card service. Whenever the Just-One cardholders make a purchase in any member shop, their purchase will be recorded in Juse-One card and their accumulative points will increase accordingly.

By using Just-One card, companies can save money because they do not need to produce millions of cards and maintain an information system to storage information, customers can be more convenient because they have Just-One card instead of a pile of cards, and we can make money by charging a commission fee to the member companies.

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