How does Greenpeace convince these amazing people to take up such awful jobs?

The Bay Area (and, I assume, other fairly affluent parts of the United States) is plagued by these Greenpeace street canvassers who stand around in commercial districts and try to get you to donate money or something. I never ever talk to them.

But I can't help but notice that they seem to be really good at what they do. They're usually fairly attractive…