Digital classifieds differ from conventional e-commerce in that there is only one of each item. A classifieds item can typically be consumed only once and that's it. This is important because online marketplaces commonly see e.g.
80% of conversions go to merely 10% of the items
and marketing efforts tend to make this even worse, since
data-driven algorithms look for popular items
wich is fine for e-commerce, but not for classifieds. At any given point in time a house can only be sold once for instance, so its completely useless to bring more attention to it when it already has plenty of leads. Classifieds marketing has to focus on the items that still need it, not the popular ones.