The question https://webapps.stackexchange.com/questions/73368/is-reddit-a-good-place-to-ask-questions I asked has been put on hold as primarily opinion-based. So I come to the What topics can I ask about here? and I see that my question is on the scope of Web App. I don't think this question is opinion-based because you still need to give some example to prove your point, but I agree that it is on the line.
You're asking about how 'good' a specific question will be perceived. That's not a question on how to use a website in a specific function.
if you'd asked "How do I ask a question or how do I create a poll on reddit" - then it's on-topic.
Furthermore you state
Please give an example to prove your point.
which is an further invitation to request for more opinions and hence was closed