I can't see any direct transfer or anything between magicdice's accounts and powerguy that would not be bets, referral or dividends claims.

But I found that @powerguy is owner of these accounts: @assassinss, @crypto-miner, @dice-dice, @diceking, @kingdice, @powerguy, @steem-nice, @steem-steem.

So it really stinks... those accounts were the biggest wagerrers.. so @powerguy was 'mining' the tokens all the time, not just in the beginning. What is interesting that @powerguy received transactions through binance (screenshot below), although he uses upbit. I like the memo of these txs.