Via
http://reviews.cnet.com/exclusives/

You need to sign up for cnet email (ie use a junk account or unsubscribe after getting your free product).

You need to confirm the account, so it must be a working account (I use a seperate gmail account for junk email or signups - easy to search when you need something) then go for it! Looks like you can get up to 10 free licenses when doing this as well. Might as well share with your family!