Ozo....I think/believe this tells you what you are asking...
"Add Camera / SW to DB... - Add the compression signature of the image to the database! This shared database is used to determine what digital camera (or photo software) was used to create the image. The database is growing and will be constantly updated by other JPEGsnoop users. Please only add a camera compression signature to the database if you are reasonably sure that the image is direct from the camera (i.e. not processed or edited in any way) or processed from a known software program. When submitting the compression signature, absolutely no image content or EXIF data is recorded -- only the compression statistics and quality setting. "
Probably. But I usually know what camera was used to take the picture. And EXIF info already tells that too. I cleared the check box for that option, just in case... -- Keep it simple, it'll become complex by itself...