So this question has to do with customer perception on billing.
Our business will have a series of charges from $1 to $5. When initially setting up a session, there should be anywhere from 10 to 100 of these $1 charges along with a $5 charge. I was thinking a shopping cart style combination of these charges to group them all, and then using the standard payment method.
The problem comes with users adding additional charges as their session progresses. Add something here, $1, add something there, $1. Obviously, Micropayments are built for those kinds of charges, so it would make sense to use them.
As a consumer, would you rather get micro-charged (more, smaller charges), have a $10 minimum for a check out (and avoid micropayments), or have a fee added for carts < $10?