I once, very briefly, worked as a telemarketer. I know, you hate me. I'm sorry.
We were collecting charitable donations for "The Police Benevolence Foundation," which had absolutely nothing to do with the police per se. I still to this day don't know what the money we were collecting for actually went to. They wouldn't outright tell us. They would only respond to the question by answering 'we might use the money to help officers who are wounded in the line of duty.' Then again, they might not.
We were told to never accept no for an answer. In fact, we couldn't accept two no's for an answer. We had to be rejected three times before we could give up. And they actually had to say "No," or "I'm not interested," or in some way offer a firm rejection. "I don't think I can afford it" did NOT count as a rejection.
So one day, I was listening to an old lady tell her tale of woe: her husband had died, her daughter never visited, she didn't know where her cat wandered off to, she couldn't afford her medication, she was laid up in bed for two months and her home care nurse was stealing her valuables... I really didn't want to keep pressing this poor old lady for money. But she had never said "no."
I should say there was also a strict guideline on how long these calls should LAST. The sooner you get one out of the way, the sooner you could start ripping off someone else.
Instead, I listened to her and tried to console her as best I could. After about the first three minutes I never brought up the subject of the Police Benevolence Foundation again. We said goodbye after about 20 minutes and she thanked me for calling.
As I left for the day, the boss calls me over to berate me for the length of the conversation, and--since it was screened--hassle me about letting her go without ever getting one firm, "No."
As I walked out the door, I waved and said, "Bye! Bye! Bye!" I never went back.