Question: I got to thinking...

Should questions with an open bounty get bumped periodically? Maybe once halfway through the bounty.

Answer: 
I think

* having a dedicated tab on the homepage
* a visual marker that distinguishes them from every other question
* a potential reputation award for every new answer
* getting bumped to the homepage at the time the bounty is set

.. is sufficient.
I've had a few bounties that after making the question a bounty I only saw probably 20 or 30 more views and no new answers or anything. You put a bounty on something to get it answered. Not as the creator of some competition 

So bounties could be bumped maybe every day of the bounty. This way the question has a much greater chance of being seen. I mean, who looks at the bounty tab exclusively?