Would a ~classified sub make sense for SN? Newspapers used to make most of their revenue from classifieds (before craigslist disrupted that business model and caused the downfall of journalism due to adoption of the clickbait ad model).

A classified page with tags. The ads could have different msat/min costs for different tags or locations. For example, a classified post for selling an S19 could pay 10msat/min with the electronics tag, and 100msat/min for the miner tag, so the same post can complete against different tags based on the context of the post.