[nmridul]

Sounds true and I would have expected the same with Television / movie commercials, that people will stop buying those brands. But most of the people go to supermarkets and buy the product that are familiar.

This could happen here also. Creating a familiarity. So even if a person is initially irritated, after a month when he / she goes to make a donation, it would be to a charity that is familiar than a completely unknown one.

[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.