I would like to provide an idea to enhance the process of make decision of final bounty amount.
1. 3I post a Bounty Requirement with several optional bounty amoumts. e.g 100 PTS, 200 PTS, 400 PTS
2. Forum users join, and voting for that, which they think should be the approximate price for the task. The bounty with most user support would be the final bounty given to someone complete the task.
3. Maybe, even voting for the final effect of the result of task, give 90%, 100%, 110%.
This could be just a small improvement, but can attract the community to join and contribute in some degree.