According to most reports approximately 3,000 delegates from the National Baptist Convention, attended Hillary Clinto’s key note speech.  There were 20,000 at the convention, only 3,000 showed up to listen to her speech.
According to the New York Times Hillary Clinton sold 2,912 books in the first week:

[New York Times] Hillary Clinton’s newest book, “Stronger Together,” which provides a policy blueprint for where she hopes to take the country if she is elected president, sold just 2,912 copies in its first week on sale, according to Nielsen BookScan.

Both Mrs. Clinton and her running mate, Senator Tim Kaine, have promoted the book on the campaign trail, but the sales figure, which tallies about 80 percent of booksellers nationwide and does not include e-books, firmly makes the book what the publishing industry would consider a flop.  (link)

But, let’s talk about those “polls” eh?