If you're speaking of evergreen content funded by the chain, I've been thinking about this lately.
One way to do it would be for a frontend (let's say a PeakD clone) to re-post an inactive post if it receives a new vote, and only show the newest post while hiding the old ones.

The people I've ran this by have criticized the fact that old posts would hog rewards. Maybe they could have reduced rewards (certainly a way to send rewards back to the pool itself can be created. I can think of a hard way to do this) or maybe Hive just isn't ready for it yet. What are your thoughts