However, one is not required to give the actual information that describes you (in fact, I make sure to describe Dr Drib in all mine, as he likes these so much; this one was missing the spot to click on "grumpy over free offers"
).
Any email address will work, so long as you can pick up the email for "confirmation", which is where you get the link for the book. You can also immediate opt out after getting the first newsletter, if you used an account where you get anything but spam (I thought this was what a yahoo email account was for, as I never get any real mail there).