Joke Collection Website - Public benefit messages - Why are short messages from Bank of Communications so expensive?

Why are short messages from Bank of Communications so expensive?

Bank of Communications debit card (savings card), annual fee 10 yuan, SMS is free.

Bank of Communications credit (credit) card, SMS reminder 4 yuan/month, Bank of Communications Platinum (Kirin) credit card SMS reminder free of charge.

Credit card SMS reminder means that if a single transaction exceeds 1500 yuan, the default transaction reminder SMS is sent free of charge. If you need any amount of SMS reminder, you need to call the Bank of Communications Credit Card Center to apply. This function will take effect immediately after the application is completed. At the same time, this function is not provided for free. There is 4 yuan's function usage fee every month, and it will be deducted once every quarter 12 yuan.