You've probably seen it. The fish monger sees a decline in business, so they have less money to spend on upkeep and inventory, so they keep the fish a bit longer and don't clean up as often, so of course, business declines and then they have even less money… Eventually, you have an empty, smelly fish store that's out of business.
The newspaper has fewer advertisers, so they can't invest as much in running stories, so people stop reading it, which means advertisers have less reason to advertise which leaves less money for stories…