@Brick 1. You're right, I forgot that "closed as duplicate" is an exception to the AbandonClosed reason. This would seem to be a reason to never close reposts of closed questions as duplicates, but instead close them with the same reason as the original (so both will be roomba'd if they stay at zero score). 2. I don't quite follow your second comment - a dupe target needs to have an upvoted or accepted answer, which should prevent roomba deletion.

Closure isn't so much correlated with time as with the number of views: the fraction of users who cast any votes, be they up-, down- or close votes, is rather small. Your question has currently 60 views in total, so if you're unsure about its on-topicness I wouldn't take it staying open so far as an indicator either way.

The ability to close questions with active bounties was only recently introduced (literally this week!), so we don't have any habits or statistics around that functionality yet.

(I'm not the mod who handled that comment) In what way exactly do you think it is helpful to tell people to publish on viXra?

They're bookmarks in more usual terminology, see meta.stackexchange.com/q/382019/263383

@NorbertSchuch I've linked a meta.SE post that explains this feature in depth and cited the directly relevant sections.