opt-in e-mail list advice

Hello, I need about a advice,
I saw on a website the following offer (for a limited time) : Lifetime membership for only $29.95 for web based optin email safelist (described as 100% optin and 100% legal to use, 500,000+ addresses updated every dayautomatically), any subscriptor will receive lifetime access to members area where can access the optin email list 7 days a week and from there type in message, click, and email is automatically sent.
The URL is http://www.email2success.com/?hop=special.e2success
What do you think? Are they cheater? Is it possible for so little amount of money?
Any advice will be welcome, thanks