My daughter worked a while back for CBRE in NYC, a pretty good well paying gig for her. She quit after about a year, she said it was unbelievably boring. While she was there, Hillary gave a speech to the assembled masses. I was quite interested in what she talked about, but my daughter said she didn't pay any attention, and she didn't think anybody else did either. It's a great gig, you get wined and dined and paid handsomely for giving the same speech you give at other places with some name changes.
I personally think of very few people in history really worth hundreds of thousand for some speech, Einstein comes to mind because I'm rereading a book about him.