They advertise because they want your money, they want you to drink milk for your calcium yet the product makes your blood acidic which reduces calcium, they tell you that the price of this and that is going down and it does because people believe it, meanwhile they pick up your sells and add it to their stockpiles to sell back to you later at a higher price, they smear the media including blogs with doom, gloom and doubt to cause you to flinch to their advantage.
It's profit and the meaning of existance for most. There are no rules but gain and they all steal because they never reveal to you the whole truth. If you don't know then it's your fault and you should have known better if you're in the game. Whether it's subtle or no it goes on and it's a bill of goods we bought. The system is set up and it works for those that set it up and those with the desire to live there. If you think this board is clean and that "everyone is just doing their best" then you might be right in a way. The question is what are they trying their best to accomplish.