Long queues form and you struggle to serve everybody. People leave to other vegetable sellers with shorter lines. A woman tries to pay with a large bill that you cannot change. The woman asks if she can pay with mobile money instead?
What should you do?
You don't want market sales on your personal wallet and have to repay uncle later. You deny the woman to serve the other waiting customers.
You decide to accept the mobile payment and perhaps encourage others to pay this way, to speed up the long line.