People who say that profitability is too low, then at the moment yes it is. I for one have spent far to much money on my miners to even contemplate turning them off.
My plan is simple. Cover the cost of mining myself and anything that is mined I will hold for months, maybe years until the price of BTC reaches thousands of $$ instead of hundreds.
Hopefully when BTC becomes more popular and more mainstream, by then the price should hopefully warrant my very expensive mining operation.