I don't like the voluntary contribution Model because you never make the money you're really worth because the vast majority of people won't pay no matter how much they love you unless they are forced to. (For example, only a tiny percent of regular NPR listeners ever donate a dime.)That said, voluntary contributions make sense in three areas:#1. Goal is maximum public reach: If the primary and overwhelming goal of your organization is to serve/reach as many members of the public as possible, th...