[chii]

Branding takes quite a bit of work (and may be demographic/psychological profiling of the target audience). At best, randomly redirecting incorrectly typed domains to charitable org's websites just achieve nothing, or at worst, confuse the viewer, and associate "error" with charity.

But buying SEO juice with unused domains the same way spammers do is probably a better idea - then a google search is going to turn up the correct sites.