Where Pochi actually costs you money
Pochi la Biashara lets a small trader receive customer payments separately from personal money, and receiving is free to you. The cost shows up only when you withdraw cash at an agent, on the standard withdrawal tariff.
The practical lesson is to keep money digital where you can. If you pay suppliers, rent or stock straight from the wallet, you avoid the withdrawal fee entirely. Withdraw only what you genuinely need as cash.