Too much of their money is spent on overhead and advertisements aimed at getting more donations. They do little "boots on the ground" work and some of their philosophies run counter to true wildlife conservation. EG. They actually support hunting of some endangered species. They also have a tendency to pander to govts such as the Chinese. There are many other organizations out there doing solid work in combating trafficking of endangered species. Those same orgs also more more money into doing actual work and less money into supporting huge administrative overhead.