Yeah, good question... we both know that all those accounts combined wouldn't register a penny of rewards. I'd classify this as a sybil attack, basically.... but I fail to see the point. Maybe the hot tab nobody ever looks at? I don't get it.
At any rate, I can't control who votes on my posts... you can only control who you vote for, right? Whether one account or 50, that is up to you if nothing else.
The hot tab isn't Sybil attackable any more (and is actually useful now). It was changed to use SP. So I don't know either. I find it interesting, but don't know what to make of it beyond that.
baccist, the only explanation i could thing of would be, that someone who is followed by these bots has voted you and therefore the bots jumped in and voted.