Can I set my own currency and exchange rate?
Yes. Call your currency whatever you like — Coins, Gems, Points — and set how many of them a user gets for each dollar you earn. You can also pick how many decimals to show and whether numbers read 1,250.50 or 1.250,50.
The settings page shows a live preview of real offers at your rate, so you can see exactly what your users will get before you save.