>the parallels between holding a grudge for the perception of being treated poorly coming out of combat, and being asked in peacetime to pay for a previously fr

>the parallels between holding a grudge for the perception of being treated poorly coming out of combat, and being asked in peacetime to pay for a previously free service, are weak That was my thought exactly. I think the main difference between the two scenarios is competition. There is only one Red Cross, but for most apps out there, there are likely a few others that do almost exactly the same thing. So, if one starts charging, you can decide to either switch to a different, free alternative, or you can decide to pay for the app. Being able to even make that decision is empowering (so what if donuts cost money? muffins are still free!). In the Red Cross's case, there was no choice; the soldiers had no power: you either pay for a donut, or you get nothing.