why would someone want to place 30 odd million shares at a low...

why would someone want to place 30 odd million shares at a low price to hold the price down and risk them being sold, what would the do if the whole 30 just disappeared?
Seen people say they are trying to top up on shares at a low value but it seems like a wild play to risk having your shares sold at .006 just to buy at .005? is .001 really that much of a difference for the holders of that type of volume.. assuming if he is putting 30mill on the market to hold price he would have to be holding 200+mil?

someone enlighten me