I don't agree with the narrow definition of clickbait. I think any sensationalism in headline, for sake of gaining clicks and attention, can be considered clickbait. I saw Wikipedia also proclaims the same relation to ad revenue; I just disagree that it's the only interpretation as people have been using the term more broadly for a while now even if it's origins are of the online advertising world.

In this case, I wouldn't categorize the headline as sensationalist though, considering that it's accurate and the next 72 hours are actually important.