If you look on their site, you'll see it's called cashback. That means they are being paid by a webhosting company for new customers, and return some of that money to you. It's all about marketing, if it's true.
I looked for the company you referred to on the web, and find they seem to be spamming forums lately. And I read a warning to never trust companies that don't tell you where are they located. But that, of course, is up to you.
Kees

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic