It turns out that the WTBTS got some help in setting up its Charitable Giving program. They bought a package deal from the folks at Planned Giving Resources: http://www.pgresources.com/clientlist.html
I see that there are a couple of hundred organizations on the client list, including the National Rifle Association of which I am a member. I will have to write the NRA and complain that they are having a bad association.