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[bobson]

So what about extras? As far as I know, extras will always be the same if taken from the same game. I understand rewiev, scrnshot, but for example: music. If it is possible to take it out, everyone will have the same chance to take the same music out.
Am I wrong ??

[The Fifth Horseman]

Yes and no. Music can be ripped out in different formats, and if ripped to a waveform filetype, each individual rip will differ a little.
Similar thing is with the manuals, where you also need to remember that certain sites watermark their manual scans.

[bobson]

about music I have to agree, but if on a game CD or developers page is a manual in .pdf or .doc then what watermark?

[DonCorleone]

You can set up for e.g. in word a page with your emblem in the background. After that you can make a pdf out of these files. In the case of scans you maybe have to photoshop a little or something like that. But that's it.
And of course you can give a pdf file its unique properties that can be locked and only the owner has the right to alter it. That would be another kind of watermarking.
But that doesn't mean that every AB site does it this way. Maybe in the case of manuals it would be a little fuddy-duddy. And only CERTAIN sites were mentioned acting like that...