You don't have any Impression because you didn't added the CJ pixel to your Link
Tracking Pixel is a .Gif image with 1x1 px size without any color when some one see your page that image which is unique for you will be load in CJ server , it will count as 1 Impression
when you don't include that Pixel image to your Link you wouldn't receive any Impression.
CJ doesn't pay for Impressions any more , so its only for your own tracking and adding or not wont influence your account at any case.
if you are Doing PPC and you directly put your CJ link you cant add that tracking pixel for impression but if your ad is landing on a web page just go to Get links > and click on HTML link and completely copy and paste the Code on your web page.