All else being equal, not advertising your virtue would seem like right thing to do. Though, from more utilitarian perspective, if you actually care about about

All else being equal, not advertising your virtue would seem like right thing to do. Though, from more utilitarian perspective, if you actually care about about cause and want to make a difference, this could be wrong decision to make. In effective altruism circle it is quite common to argue to be public about your charitable activities, lets it will inspire others to do the same, and there seems to be sufficient evidence to say that it indeed works. BTW, I hope that someday economist will stop spreading barter myth. Yes, it is nice thought experiment conjured by Adam Smith, but if you actually look what anthropology and ethnography has to say about it, you will see it is completely baseless claim [0]. [0] Barter and Economic Disintegration, Caroline Humprhey - "No example of a barter economy, pure and simple, has ever been described, let alone the emergence from it of money; all available ethnography suggests that there never has been such a thing."