All this is very surprising to me, I assumed that the koreans were also behind the recent Hive pumps for the moment when happened and coming from Upbit, but if this is an attack I tend to agree with @blocktrades, i don't think that can be a stupid move but a planned one. And kind of annoys me that we can't see the reasons why they do this or what is their real target.
There have been multiple post speculating about this but since you pointed out is also concerning to see Haejin's return, did you notice that?. Because wasn't even mentioned in the post.
My recommendation would be to have our eyes opened and following the events that may come.
SL seems also involved in this in some way.
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Confirming what I said about Haejin, he hasn't been active, I saw only an upvote from him to an artist and thought that was back but he doesn't post anything and it's powering down, so may be only his account following a trail.