Recently, this question attracted a lot of attentions, surprisingly not just from new users even from experienced users with moderation capabilities, despite the fact that it is obviously off-topic and opinion based.
The other issue is that it took more than "2 days" after several flagging and reporting to close this question and remove spurious and spam answers, until the moderators closed it finally, despite the fact that many more relevant questions have gotten closed already less than minutes as off-topic or primarily-opinion based.
My concern is that it seems even experienced users with moderation capabilities don't care too much about guidelines that say what is on-topic and what is off-topic here in Academia.SE and don't have an equal approach to judge the questions. My guess here is that because this question, despite the fact that it is obviously off-topic, attracted a huge amount of attention (> 8k views until now) and as a result, people preferred to put some answers in the hope of getting reputation, which I think it worked very well for some people here.
So I ask my question again: Why there is no an equal approach to judge which questions are off-topic or primarily-opinion based?