Stop being tempted by any sales page about anything, you don't need to spend any money on anything else than domain name and web hosting and a lot of free time to get good earnings with adsense.
It can be hard to really earn money with adsense if you're in a niche that doesn't convert well. I would look at alternate ways to bring in earnings. Like facebook or pinterest.
Hard but not impossible. it can sometimes be worth adding to your site just for the extra income persay.
The site looked totally bluffing. They have not a single proof about their offer. Even if they do, why pay for some thing that you can do by your self.
I would not depend on adsense to make a living anyhow. Just way too easy to get banned for anything, even if you do have 100% unique content. List building and networking is the only real way to get wealthy online. You make real profit bey getting people to pull out their wallets to pay and not depending on them to click on a stupid ad link to get paid a month or two from the time they clicked. In my opinion, use adsense as insignificant play money and make some real long lasting solid money how I do it: http://www.weprofitonline.com
bought it already...gone thru the keyword research process as he advised. I know this will take work but i am willing to try. Better try than just sit and say "it will never work" I've come up with some niches that have low competition in the medical field..it takes work but you can find gold if you dig deep enough