This question is migrated to MSE from MO.
It did not get enough attention in MSE even after offering bounty.
Another question with a bounty with not even a single comment.
I think topics like Characteristic classes get very less attention/not suitable there. Out of $395$ questions, $134$ are unanswered. Most of them does not even have a comment. In November four questions have that tag, two of which has no answers. In October four questions have that tag, none of them has answers. This is more or less the situation.
What to do in this case?
Should MO users allow to some extent not so high level questions with that tag to survive here?