I’ll go straight to the point:

• Piracy is useful to bypass regional frontiers and access to censored content
• Piracy is helpful to watch content without supporting it if you consider it not worth of it
• Piracy might be helpful for content preservation and survival
• Piracy is useful to ACTUALLY evaluate whether to spend money on some digital content or not
• Piracy is sometimes the only way to actually own DRM-protected content