Another angle: Perhaps the user is trying to bypass some restrictions or is using SwiftShader in a different context where a visible watermark is present, but that's not the standard. Maybe they're referring to a specific application or game that uses SwiftShader and adds its own watermark, not SwiftShader itself. If that's the case, the review should clarify that SwiftShader itself is open-source and doesn't have a watermark, but other applications using it might.