It is understandable that many people are not keen of putting a picture in their profile. But if you are going to include a picture, it needs to be appropriate. A poor-quality picture, or one that was taken years ago, or one in which you are not dressed to impress, is worse than no picture at all. We have seen profile pictures of guys wearing a t-shirt or with head in hands, or pictures of girls that are blurry or with her wearing a dress that makes then look like a teen. Get a professional photograph that conveys the impression you are hoping to give.