Earlier quoted context omitted.
> It's not a free market for manipulation. Advertising, lobbying, PR, think tanks, ... are all legal. They are all in the market for manipulation.
Right, these are legal and regulated forms of manipulation. Covert manipulation is mostly sanctioned through platform TOS and laws.
When Ford pays money to product place one of it's cars in a movie, that might be declared and invoiced in some contract, but you as a film watcher will never know it (unless they make a point of announcing it). So please explain how movie product placement is not covert.
The same with PR, think tanks, and a lot of advertising.