Each time an Admin approves a teammate's Rewards request, the company credit card on file will be charged for the Reward. In other words, coins are not prepaid for.

The cost of the reward is the face value of the gift card or charitable donation, plus a 3% transaction fee to cover automatic delivery fees.

So for example, a $10 Amazon Gift Card will cost $10.30

There is no cost associated with custom rewards because teams/companies are responsible for their own delivery of the reward.