What about an ingame feature that lets you convert xp to cbills. something rp based that makes you do something in the game to convert it. Maybe a mini game or mission type with objectives you have to complete in a pug or something. I play KSP and they have contracts and what not. Something similar to do work in game to convert resources. this could allow slow conversion of extra xp to money and you could keep doing them to build up cash.
The more XP the greater the c-bill intake. So the more experiences you are the more you are highered for per say. You will get a week or a month to complete it and can do so many at once or so many over a period of time and get cbill rewards. Maybe with lists of things to choose from also. And rewards in the achievement section for it if appropriate ones don't already exist.
Edited by Arugela, 14 January 2017 - 01:47 PM.