Joke Collection Website - Public benefit messages - How do you charge them for short messages that use tools to advertise?

How do you charge them for short messages that use tools to advertise?

The company that sends short messages to users is called SP company, and each SP company has applied for a service code in Mobile. After users reply their code, they can collect money, and finally mobile and SP company will share it in proportion.

The cost of SP company is low, about 20 cents a piece, because of the large shipment. Don't worry that they can't make money. Because a user replies, it will be deducted several times, and many will be deducted dozens or even hundreds of yuan.