1) You can use any email you want but what I didn't want was some junk email that people use.. and then after it's done... they say.. so where's my book? When I'm done, I'm sending out 1 notice to the email on file. So while it doesn't have to be one you check every day literally, that just means.. don't give me some spam blocker email address or you'll never see the download link.
2) The book you got in the newsletter is only a mere sample. While that is actual content, there's a ton more in the real book plus bonus material.