Two points in response:
1.) The article clearly states we should all vet things ourselves and not depend on others to do so for them.
2.) As noted in a reply to the link you provided: “I think people are ignoring the fact that half of what IC does is create awareness, and that part is free. You don’t have to donate to IC to tell the world that there is a man acting like Hitler in the middle of Africa. Regardless of who spreads awareness, this guy needs to go. Critics are missing the forest for the trees.”