How much can one usually expect to make? Is payment usually just the runes they make?

As far as I am aware rune running is pretty dead these days due to trade limits etc getting in the way.

 

 

 

for allk bar the low end runes such as air anyway and since the payment is generally in runes and low end runes dont sell much you dont really make money you just gain supplies

ahh right that stupid trade limit. God its annoying