The reason for this post is due to the binary decimal representation challenge, where @primo is, as of writing, awarding a bounty for the fastest solution to a code-golf question.
In response to this, I'd like to raise a few questions:
Is it acceptable to start a bounty for a question with an alternative winning criteria? (e.g. "least whitespace characters used", "most popular" or "least memory used" to a code-golf question)
If the answer to the first question is yes:
Should the new scoring criteria be somewhat related to the original scoring criteria for it to be acceptable? (e.g. "least whitespace characters used" is tangentially related to code-golf, but "fastest code" is basically a polar opposite)
Should an answer aiming for the bounty also try to conform to the original scoring criteria even if it doesn't make much sense to do so? (e.g. golfing code intended for a "fastest code" bounty)
If the answer to the first question is no:
Is it acceptable to form a related question with the new scoring criteria, possibly with the permission of the original poster? (assuming this does not cause the new question to be a dupe)
Are there any alternatives to the previous question? (e.g. if we're desperate to see an efficient implementation for a code-golf)
Is there anything we should do if we see an alternative winning criterion bounty?