Just to make a point here 1 per 10,000 is really too cheap. It could be easily increased by a factor of 10 without making any noticable impact. The value of civillian fuel is enormous, and civillian minerals are in comparison extremely expensive.
The NCC paid 1% of its expenses for civie fuel but 43.8% for civie minerals. There are 16 harvesters in operation generating around 2-4 million fuel per year. I don't know exactly as I skim it off when the harvester has 100K or so fuel onboard.
It also should be a far more important source of income to the shipping lines that have harvesters than it currently is.
