a lot of those are actually a 3rd party sales/marketing company that is paid a commission of something like 20-30% of each signup. If you pressure them enough they'll admit they they are not W2/T4 employess of the charity they're pushing.

the vancouver area was plagued with the "because I'm a girl" charity muggers for years downtown

Helsinki was lousy with them when I was there a few years ago. Between the train station and my hotel, a 10 minute walk at most, every intersection had them.

I had one accost me and launch into her long spiel without me being able to stop her. When she finally paused to ask me something, I had to tell her I didn't speak Finnish.

(Of course she spoke english but didn't press after that. And now that I think of it, and on-topic I had a similar thing happen with mormons pitching me in German in the Köln area. When they found out I couldn't understand them, they - as Americans - switched to English and we had an interesting conversation between strangers about why we were all there. They did not try to further sell me on the religion other than some very fleeting "if you're interested" as we parted. Overall it was actually interesting to meet them. Maybe it would have been different if I'd got the German pitch, we had a few really awkward approaches from these kind of religions people (evangelizers?) in university that were not as pleasant, I don't know what faith though. )