Alternatively, if you do find yourself in a group with similar preferences to you, you can collude. Failing that, you can assign your entire donation to an individual charity, choosing randomly weighted by your priority, and thus reduce the impact of transaction fees and other per-donor costs on your donations (such as marketing materials to encourage people to donate again).
Alternatively, if you do find yourself in a group with similar preferences to you, you can collude. Failing that, you can assign your entire donation to an individual charity, choosing randomly weighted by your priority, and thus reduce the impact of transaction fees and other per-donor costs on your donations (such as marketing materials to encourage people to donate again).