how do you know they have no reason to skew their results?
what makes you think that the charitable arm of a private for-profit corporation exists for anything beyond a tax writeoff?
I don't really care what their reason is. The work that their charity does is necessary and important. The reason - for me - to accept their results is that I don't see what they have to gain from skewing them. What's in it for them to skew their results?
People seem to be of the opinion that Bristol Palin is their sole spokeperson. She is not. I have already provided a link to a list of celebrities who work on behalf of the charity. Then the argument was that she was paid $262k for one advert. No, she wasn't. She was paid for one campaign - that includes the tv ad, a set of interviews, and other ad work. Then, she's not suitable because she's a single parent. That's actually what makes her the right person to do it. She uses her own experience to explain why it's not smart. Then, the argument changes to there are better celebrities they could have chosen. How do we know they haven't already approached those and been turned down? We don't. How do we know they haven't signed others up for future campaigns? Again, we don't.
In short, every single 'reason' is bullshit.