With this STEEM exchange rate as of now, a 6% ROI is a guaranteed loss of about 20% of the bet, because the bots are set to a voting power of at least $ 2 per 1 STEEM, consider this point. I made a bet of 4.7 SBD, got a vote of $7.56 - which means the payout will be (minus curation fees) 2.83 SBD and 1.2 SP. Greedy owners of bots want us to fight for their vote and so that we feed them with our money, they do not care whether we earn or not, and we happily bite each other's throats.