I've seen a default "Not about Apple products and not in scope of this site etc." as closing reason. It does not show up in my options, is it diamond mod only?
Can this be added to the 3k rep closing vote?
This is what I see:
After 3k, blatantly off-topic gets replaced with "Other" and one should explain how it is off-topic.
I suggest you use magic links in the close reason so that after commenting, they lead to the right page. For e.g.:
... because this is off-topic as per [help/on-topic]