Is watermarking worth it?
Are you concerned about image copy protection being a photographer or website owner? Are you interested in image watermarking software? If so then which one do you use?
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IMO, Watermark does very little to protect your images, unless you make it so hideous and ugly that it ruins the very image you want to protect.
Whenever I want to add watermark, I don't use a special software. I just use Photoshop.