SpookyCash did this back in 2007. I thought affiliates would really like some of the improved functionality, especially the ease of pulling things like referring stats. Wow, how to piss off 6,000 affiliates in one complicated time-consuming step. Eventually ended up doing a CCBill 2.0 option. Some affiliates promote one way and some the other. Lange is fantabulously awesome. Can't say I've noticed Epoch having better throughput though.
In the end, SpookyCash ended up offering affiliates a choice of CCBill or Epoch and just maintaining parallel tools and tours.