Similar to "StackExchange could offer Bounties on old questions" but I'm suggesting this be done without user input, so not based on nominations but purely on stats on the question.
Specifically, I'm proposing that the system generates occasional bounties on questions that meet the following criteria, and when there aren't more than a couple of other active bounties on the site:
- posted more than 2 months ago
- no answers (or maybe no recent or upvoted answers)
- above-average views?
Candidates on BH.SE for example, are easy to find starting with this list. The top question there sparked some interest and plenty of votes, but has now dropped off the radar and will likely remain unanswered. This is something that tends to happen with the more difficult questions on a technical site like BH: we'll vote up the good question but just never find the time to devote to a worthy answer. A bounty would:
- provide that little bit of extra incentive
- increase the visibility of the question for longer that a @community bump