Is there a minimum contract term length for ads? What’s the average? October 07, 2019 19:01 Yes. The minimum contract term length for banner advertising is one (1) month. The average banner advertising campaign is usually signed for a 6-month term. Start Advertising with us » Related articles How do I get full access to the app? What are your banner ad size requirements? What does the posting rollover function do? How can your load and truck matching services help me?