This makes no sense, why would they not like big farms. Big farms mean there is lots of hash power available and can thus go through orders faster which means more profit for them. Orders that sit uncompleted make them a little bit of money (one order fee) but then those buyers never place new orders (additional order fees.) Right now I wish there was more big farms because that would mean my order would get completed and I would happily refill or set up a new one but unfortunately there isn't enough hash power to reach my order while we also have massive buyers at the top.