That site is a scam. Even the homebrew application that it shows (from the Homebrew Browser) can be legally downloaded for free, as you can see here...
http://www.wiibrew.org/wiki/Homebrew_Browser
Use the Twilight Hack or Bannerbomb to install the Homebrew Channel, and you are good to go. If you need any help with it, post any questions in this thread.
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