Yep. This is no different than any marketing campaign. Trump builds the product, and people set up websites "selling" it.

I've been in marketing a long time, and everything I've seen reinforces my cynical view that people are nothing but a bunch of sheep waiting to be herded. As a convoluted example, consider the fact that simply changing the color or position of a button on a webpage can measurably alter the rate of people who click on it. Looking at it this way, one begins to wonder when free will ends and conformity begins.