At the end of the day, bounty campaigns operate like a business - you are employed by them to provide a service, and they pay you for your time (even if the payment is some utterly worthless token). They are free to stipulate any rules they wish, regardless of what the forum rules say.

The bottom line is an individual or company who is hiring people to perform a task is allowed to set the rules of that employment. If you don't like those rules, don't apply.

If a project is paying money to hire someone to do a job, then it is entirely up to them what metrics they use to select the person they are going to hire for said job, even if you think those metrics are flawed. You're not paying to hire the person, so why should you get a say in who they hire?