For internal purchases in the App Store, Google Play?

Question

Apple App Store

We want to make it possible for users to sell their content in the app. As far as I understand, you will need to pay 30% of the App Store, Google Play. Are there any legal tricks or other sales scheme of this type. Because it turns out that the seller will receive only about 65% net (if we don’t take anything for ourselves from above), because somewhere else the bank is eating its percentage for the transfer.
Let's say Uber and Yandex Taxi do not pay 30% each

Answer 1

Below are the types of goods and services for which the content payment system through Google Play is not supported.
Retail items. For example, groceries, clothing, household goods, and electronic devices.
Paid services. For example, transportation of passengers and cargo, cleaning, food delivery, air tickets, event tickets.
Membership (one-time and renewable). For example, in sports clubs, as well as in clubs offering accessories, clothing or other similar products. This also includes participation in loyalty programs.
One-time transfer of funds. For example, transferring funds to another user, online auctions and donations.
Online payments. For example, paying debt on a loan or bills for utilities and telecommunications services.
As I understand it, you can not pay%