I think I speak for a large majority of people in saying the following: I would pay a little money to have my ISO reset back to my balance. This could be done so that I could more effectively disperse the ISO where I believe it would help me the most.
By no means am I saying this should be a free service that could continually be utilized. However, it could be something similar an XBox Live Gamertag adjustment. They charge around $10 for this service. A similar charge would be not only revenue driving, but increase customer satisfaction with your product.