what is your opinion about having a bage
- Top x %
which is based on reputation earnings during a certain time period?
note: this info is displayed on the user summary page tab.
the idea is to gain the badges multiple times (if you qualify) after the time period (e.g.: month,quarter,year) and keep them.
You can come up with numbers for x regarding bronze, silver, gold status and the time periods (month,quarter,year).
Motivating users to get them would also boost participation.
note: you can express your approval/disapproval by up-/down-vote and/or answering directly your likes or dislikes.