Do not blur virtual value with charitable giving
Describe only the Koin item the player receives and never imply that buying it creates a donation, tax benefit, fundraising total, or verified social impact. Any real cause relationship needs separate evidence, legal review, reporting, and transparent ownership.
Run a price-comprehension check
Give a new player the offer without explanation and ask them to name the selected item, full Koin amount, available balance, expected balance afterward, quantity or duration, and ownership rule. Let them decline, then repeat with insufficient Koin and a successful choice. Review every place the value appears and remove crossed-out amounts, vague premium labels, unsupported real-currency comparisons, or urgency that distracts from the final cost. The wording on the preview, confirmation, success message, and owned view must describe the same thing. Reopen the game and verify that the balance and ownership shown to the player still match the one transaction they approved.
Keep price and balance together
Place the exact Koin amount beside the visible Koin balance and show the expected remaining balance before the player confirms. For nonprofit and cause-game teams, the experience must avoid donation claims and clearly separate virtual item value from charitable giving.
Explain duration and ownership
State whether the item is permanent, consumed on use, limited by quantity, or active for a fixed time. For nonprofit and cause-game teams, the experience must avoid donation claims and clearly separate virtual item value from charitable giving.
Remove misleading price signals
Avoid fake urgency, crossed-out prices, unsupported currency comparisons, and labels that hide the final Koin amount. For nonprofit and cause-game teams, the experience must avoid donation claims and clearly separate virtual item value from charitable giving.