All those people probably knew that reblogging that post was useless. They just didn't care. They wanted the good feeling that comes from reblogging that post, even though in reality they are doing nothing.
Yep, pretty much. Although this blog post actually has information on how to donate to the appropriate charity, which is helpful for the people who actually see it and have the means to donate. More helpful than that bullshit post about the baby with the necrotic flesh disease or whatever I reblogged a little while ago.