I wouldn't think they would be held responsible for Abdella's actions either? I mean, they shouldn't be legally punished in any way for something that he does. If that's the case, maybe that's part of the reason why some people choose not to hire PI's. As if your family member going missing is not horrible enough, if a PI makes a mistake you're going to be in legal hot water for that on top of everything else?! I would surely hope not.
I am also thinking that they may be worried about someone else making a profit off Mickey's name, and that if they endorsed a second PI that would be taking away donations that would have gone only to Abdella. That to me, makes sense. (And I'm not saying I think ACI is going to profit off this) But I'm sure they have to take precautions to prevent every Tom, Dick and Harry from going around collecting money that doesn't really end up being used by official search efforts. If they acknowledge that ACI is "on the case" and provide related links on MS social media sites, then tomorrow it will be someone else, and the next day someone else. They obviously have to keep all the fundraisers and events organized and that is a job in itself.