They make $ giving away by fooling advertisers. The bigger their subscription #s, the more they charge advertisers. Trade journals count free 'qualified' subscribers. Mags like this count only paid subscribers but the trick/lie is they sell these sites subscriptions in bulk @ very cheap prices (like a penny per issue). The website uses it to draw in your visit & your personal info so they can sell it, so they can spam you etc.
So you use disposable email accounts, change last 4 digits (only) of your phone #, & use a deliverable name that protects your ID & still gets your mail.