Excellent post!
Be aware that this same bot is not just upvoting to attempt to reap rewards but also down voting against competitors and people who attempt to curate against its spam
I wrote an article about this same bot group you are concerned with here
https://steemit.com/steemit/@desmonid/s-o-s-i-m-being-targeted-by-a-malicious-downvote-bot
I guess the silver lining is that those of us who use the platform legitimately will (hopefully) grow our steem power fast enough that a few dozen spam account downvotes don't affect our payouts our visibility that much. I hope...
That is the hope but what actually unfolds remains to be seen...
Hopefully more fine tuning of the algorithm will help discourage vote botting.