poloniex has 644.928.553 dgb sell order
bittrex has 388.282.987 dgb sell order
and another exchanges not over than 100 million dgb
total = 1.133.211.540 dgb on market sell order

circulation supply is 9.516.382.139 DGB

if miner was dumping, why too small sell order on market?why?why?why?