Looking a bit at this, I'm tentatively inclined to agree with you @transisto.

In looking at a sampling of @haejin's posts from about a week ago and earlier, what I see is this:
A prolific crypto analysis poster.
5300 followers... but only follows a few hundred (pretty normal for a content creator)
Average rewards in the $20-35 range.
Typically about 200-250 upvotes per post.
Typically about 10-20 comments per post.
Typically about 3000+ views per post.... whoa... hang on... 3000+ views???

Hardly ANYBODY on Steemit averages 3000 views per post.

Anyway, if we just leave that alone, it's the posting profile of a busy Steemian with a well-developed following. As a content creator, if each of my posts brought 3000 views here, I'd damn well hope I'd be getting $25-35 a post!

Has a web site; has a very active twitter with 9,500 followers. Posts all his Steemit posts to his twitter feed (external promotion of Steemit).

ONLY THING that has changed is the sudden 100% upvotes from an account with 1.3 million SP starting 3 days ago. An account that doesn't upvote a damn thing, otherwise. And has been largely dormant for months. That part is a bit suspect.

Other than that, we know very little. Aside from the fact that rancho's SP came from blocktrades. Most everything else is speculation.

Could we call this "rewards pool rape?" Sure. But maybe @haejin is merely a bystander who got some inadvertent good fortune at the hands of this "unknown" whale. My point: the damage is really being done by the person doing the VOTING, not by the recipient.