What is a melon seed card?

A supplementary card is a membership card that consumers can spend a certain amount of service at one time after applying for membership.

Supplementary cards are very common in our daily life, such as getting a haircut and buying 20 cards at a time. For children's playground card, one-time purchase 10 times, etc. These are all secondary cards.

The daughter card has a very good marketing effect in reality. All daughter cards have the same feature, that is, the single consumption price will be high. If you buy 10 times at a time, more than 20 times, the price will be very cost-effective. Merchants will charge more in advance, and consumers will reduce the cost of one-time consumption because of one-time purchase. This is the win-win marketing effect of daughter card.