[Coder-san]

@Op: Actually by definition, a key generator (for example from razor1911 and others) is supposed to follow some algorithm to generate, that is really generate, keys.
I'm not sure, but my best guess is that they are able to do so because the 'premium' software itself to prevent online activation and thus use a database, follow an algorithm to understand the acceptable serials. Because if you'll keep static text in your software it can be easily read by debuggers.
And that would've been something interesting.