You should definitely charge a percentage of the amount saved instead of a flat, non-refundable fee. You have created value here but very few people are going t

You should definitely charge a percentage of the amount saved instead of a flat, non-refundable fee. You have created value here but very few people are going to use it if they have to risk $20 up front. I have killed a few of my own otherwise viable projects with unnecessarily restrictive revenue models, and that's the worst kind of death because it is entirely preventable.