This question -- Why the programming code of many algorithms are not public in OR community? -- is about the field of OR. It is not a question about a topic within OR.
Is that on topic?
Note: There is some debate in the comments of that question about whether it is too opinion-based. I'm not asking about that issue here. I'm asking about whether a question about the field of OR is on topic.
For example, would the following question be on topic?
What professional societies represent operations researchers?
What about this one?
Does any federal U.S. agency offer summer internships for OR undergraduates?
Or this one?
What is the average starting salary for an OR professional?