From what I see at Transport Canada, the distinction between recreational and commercial use is hard to make. As Mr. Fraser mentioned, the regulations depend on the risk. It is the weight of the device and the type of device that determine the risk that it poses, not the way it is used. It is the device itself that determines the risk.
Someone can use a drone to take pictures, get paid to take them or just take them to admire the landscape. In any case, the device and the risk are the same. It can be the same operator, depending on the day of the week.
So we regulate based on the type of device and the way it is used.