Different membership pricing schemes

Hello, is it possible to reduce the price of plus by reducing the number of times GPT4 is used, for example, 10 times every 3 hours, so that the price of membership is set at $10 a month, or even lower $5 a month for a smaller number of times of use.

I believe that this way of selling, it will make the GPT have more paying users, because $20 a month is a little bit too expensive for the students.