Email campaigns are an optional decision in round 2. If there is zero results for the email campaign it is generally because there wasn't email campaign created.
You might ask, "Then why do I see a $29 expense?" That expense is for the email software that your company uses. You will have that $29 expense each round whether you are required to make an email campaign or not.
If you see students in your class that did generate email campaign results, this means that they decided to create an email campaign even though it wasn't required. If you are looking to create an email campaign in these optional rounds, click on the jump to tab at the top of your screen and select email campaign. This will allow you to create an email campaign in any round.