IPhone 4 unlocking? Www.Unlock-4.me?

I have iPhone 4 that is locked for Japan Softbank, I want to unlock this 4n but it cost huge amount.
I heard some website name www.Unlock-4.me is doing free unlocking.
My question is; that they really doing this?

For Japan Softbank is really expensive, over 100$. As unlock website owner I also pay a huge amount to get that phone unlocked, so I doubt someone really doing it for free. Some of those sites normally make you click on some links, install different applications to your phone so they can get an affiliate commission and probably at the end will say the phone could not be unlocked and try again or something like that

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