What is the purpose of the tumbleweed badge? Why is asking questions no one answers or looks at a desirable accomplishment?
I think the purpose of the Tumbleweed badge is (or should be) to bring attention to a neglected and probably esoteric question. Unfortunately it fails in that regard because we only see what users are awarded badges and not for which questions.
So basically this badge would have a whole lot more value if you could browse the questions awarded Tumbleweed.
It seems like the one badge where you could be rewarded for being intentionally mediocre. I could write a well phrased question about a topic that nobody cares about, so nobody answers or even reads it. It would be a valid question, so it won't get closed and would it just sits there until I get a badge.
Maybe there should be a tumbleweed cleaner badge for someone that answers one of these questions, or a tumbleweed question of the day based on moderator selection?
I think it rewards questions that were maybe done in specific technologies. For instance, I have done many questions about Apache Zeppelin which is not very popular at the moment, but maybe my questions will contribute in the future and they are building new knowledge. I'm glad I got the badge :o)