The only thing that will sometimes peak my interest enough to listen to the pitch, is if they offer non-monetary upside.
Before I lived "here", every weekend, guaranteed, at least 4-5 knocks on the door on Saturday & Sunday afternoon (combined). Trying to sell me something that I didn't need, didn't want, and often it felt like a scam.
https://www.consumer.ftc.gov/blog/2015/08/door-door-sales-an...
I'm thinking of preparing an mp3 of a chaotic household (think 10 kids screaming and fighting) for improved effect in the future.
Before they can speak, I say, "Are you selling solar, politics, or religion?"
They always protest, "But I'm not selling anything..." and go into their sales pitch.
I interrupt with again with, "Solar, politics, or religion?"
90% of the time it's solar. I tell them I rent, and they go away.
But the caveat there is that if I were to do a one-time donation, they would still have my information and the permission to receive mail on file.
Charities are marketing companies; they collect money and advertising permission, and give you direct mailed marketing in return.