Have a look at my banner design gig. You will definitely like it. I will design banners, covers, headers for Facebook, Instagram, Youtube, Twitter, Linkedin, and Tumblr. https://www.fiverr.com/amina4370/design-creative-banners-for-linkedin-youtube-twitter-fb
May be Fiverr doesn’t support marketing here.
I have read about this category in which it is mentioned you can use the forum for boosting your sales