Except it IS an actuarial calculation, as you have to weigh the people who max out the reload/GC at $500, against people who only load $50 (and any amount in between) while paying the same $3.95 (in which case, they DO make money). THAT part is variable.
touche. I was lazy and did not read the whole thread - i was thinking about the fee for flat $500 gc. Given that the gc amount is VARIABLE, then it is a basic calculation depending on what the average spend is. The assumption must have been that people will not be putting $500 on it, probably assumed the $3.95 would be enough to cover the processing fee.
That's when the real world comes in and you have to weight other factors such as behavior (i.e. once i'm paying for it i might as well put more on it - similar to deductible leveraging)