Why Does Miniapps.ai Charge Coins Every Time for Voice Messages Instead of Just Once?

When I play a chatbot’s voice message on Miniapps.ai, it takes coins the first time. But if I want to listen to that same voice message again, I have to spend more coins. That doesn’t feel fair because I already paid once to hear it. It would make more sense if listening to the same message again was free after the first purchase. Miniapps.ai should change this to a one-time payment system for each message, instead of charging every replay.