I'm hopeful that whatever weakness they took advantage of has been plugged but only time will tell. What I also found interesting was that the accounts they're voting on were all created in January 2018 and similar to what you say, a voting account only appears to vote for one user (presumably through fear of getting caught and "silo"ing their losses.

It's clever and although not the most profitable scam I've seen, the revenues could have increased exponentially.

I've caught a few of these voting "rings" in the past and I wonder if after chopping off one head, 3 more appeared.