Looking at block explorer for @hivekorea @jupiter70 and @hivehbd it is easy to see that these are all hbd/hive arbitrage bots. @nomad may be too, but can't recall for sure now, I saw the others a while back while looking at activity of arb bots on hive's internal exchange. @orinoco and @blocktrades are both "instant" exchanges (market makers), of course. As for @self-power.com, it is hard to say for sure, but probably just an active manual trader.