I agree it is suspect. On the other hand the ranchorelaxo account is older then Haejin's and has waited approx. 6 months before upvoting the crypto blog. To me, its still a possibility that the ranchorelaxo account is owned by a very detached Steemian that has made some succesful trades on Haejin advice and feels obliged to return a favor solely to him.
On a related note, I think the number of followers is unbelievable - literally. A significant part must be automated which is pointing in the direction of either:
-some brilliant long con
-opportunistic change of behaviour after initial succes
However, so far not enough proof for me on the rancho=haejin issue.
But Haejin could have easily bought in Steem earlier in the summer and then took a few months to hatch his plan.
You can tell from who up votes him and how they up vote him that it is pretty unbelievable. A lot of accounts that circle all around Haejin, giving him 75% or more of their up votes, and some of his hard core followers also raping the reward pool and giving their 98k SP investment output basically just to themselves.