MIT scientists find weird quantum effects over hundreds of miles

Yes, that's the point. The press office just got clickbaity with the word "weird," as it always does for any QM paper.

It gets proposed fairly often. The tricky part is detecting enough neutrinos in a coincidence window to make a meaningful trading signal.

Such an experiment is also very expensive.

Don't give them any ideas! We've seen how the last 50 yrs worked out! /s

That's my impression also: distance travelled as an inherent property shouldn't 'break' quantum effects. It matters only because larger scale implies a larger chance of interaction, and because it relates to no-go theorems. Still, I don't think these effects have been seen over such distances, even if they were expected.

Despite the title, the scientists quoted don't sound baffled as much as excited. I think this is a case of "we found it after all!"

Spooky because of the metaphors used to describe quantum mechanical phenomena, or because it has implications or applications that you're wary of?

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I've never understood this complaint.

Why would a writer NOT create a clickbaity title?

Every writer wants his work to be read. Would you rather have the writer create a dull title that you don't click on at all?

That robs the writer off pageviews, you of valuable information, and the site of revenue. No one benefits.