You may post advertisements in the comment box using the light and effective wpDiscuz Ads Manager system (after and before the comment form, after and before the comment list, after and before comments).
Both the comment form and the comment list might show advertisements. There are several options for creating ad banners with various display logics.
One banner may have many advertisements that are randomly shown at the top, bottom, and after X parent comments in the comment list. In ad banners, you may use plain text, HTML, iframes, and ad service codes like Google Ads.