Upvote spamming
Some of you might have problem with bots or organised users who tend to storm with downvotes cards that didn't deserve it. When I was tagging works of my favorite creator, I have accidentally clicked "2x button" few times(it's right beside mouse roll, mostly on gaming types), what has happened made me realised how the whole thing with "bots" might really work from inside. After clicking repeatedly and very fast, I could break slot machine - from 0 rating i have hit 9 in one try. Now after I look at it from this angle, "bot" might be just one guy using multiple accounts, and this technique but in reverse - to down-vote. I hope it will help all of you.