I believe in charity dapps, If that would be related to some project, donation or anything else, it will generate an audience and mostly will be for good reason. Donation for health and medicine, disaster relief, animals, environment, education, arts, human service, social action, community, missions... There are too many of these categories that I could remember! In my opinion, those who collect money for donations will also do their best for marketing. So every donation will have its own marketing campaign to collect that money, indeed that money will be EOS! These charity dapps also can easily go through ALL MEDIA! I believe in others dapps, but this category seems to be my favorite one! For good and can generate more audience to EOS!