Start with a rate you can explain
The virtual-currency test band is 80–120% of your entered rate. RapidoReach suggests this as a small starting experiment, not an industry benchmark. Change one rate at a time and inspect progression, IAP conversion and currency balances.
Redeemable points have a funding limit
Budget ceiling = points per cash dollar × (1 − reserved revenue share). The upper test rate is the smaller of 120% of your chosen rate and that ceiling. The lower rate is the smaller of 80% of your chosen rate and 80% of the upper rate. This assumes full redemption, not breakage.
Rounding and target rewards
The sample reward rounds down to whole coins. Actions to a target round up. If an action issues fewer than one coin, the target is unreachable at that sample reward. Your production currency rules may differ; configure and test them explicitly.