Recently there was a post with question which is used in an interview process by one company. I had an impression that at least questions from ongoing contests are closed/deleted (see e.g. here). Even though this policy does not seem to be strict, I was expecting it to apply to the aforementioned post as well, heaving in mind that reasoning regarding ongoing contests and interviews should be similar.
As per now, this question is not closed, which could have been due to the fact that MSE community was not aware of its source. However, another user posted as an answer (I guess his low rating did not allow him to comment) that this particular problem is used in an interview. Not only this question was not closed, but this answer - the only indication of the source of this question - was deleted by a moderator, a decision which is at least questionable.
I have come across this issue a couple of days ago, and have immediately flagged this question for a moderator attention. Unfortunately, I have not seen any reaction to that.
My questions are:
How should I expect these issues to be resolved in future, i.e. should we close/delete questions once we have a solid proof they are originally designed math problems used in the interview process?
If moderators are reading this, what happened in this particular case: why the answer by Dylan Castillo was deleted (perhaps only Daniel Fischer can answer that), and why there was no any visible reaction to my request?