I think this is a good starting point. If Collective Shout can pressure MC/Visa to do it, a bigger group can pressure MC/Visa to not do it.

However, we (people in general) should not fool ourselves that this war is over, or that this is the only thing we should be aiming for. Ultimately, the end goal should be to curtail all this pseudo-legislative power payment processors have; laws, competition, change in the economic system, etc.