Kiddo, I agree that the deal sounds too good to be true, but this current deal is only a promotion. You can read questions and answers on that page itself.

If you navigate to the homepage of the website, their normal rate is $59/ year.

Even if you buy some other service for like $50 a year or cheaper, there is no way to guarantee the company will be around for 5-10 years from now.

Good luck choosing!