It's a neat idea, but I'd be interested to see at what rate these redirected visitors actually do anything on the sites they land on. I know that if I click a link and find something unrelated to what I was looking for, I general close the tab pretty immediately.
Like antibiotic resistance bacteria, if you continue to flood the internet with begging, people will become completely immune to those types of requests (no matter what the cause or how worthy they might be).