All camera shots included an advertisement. Only while Truman continued to act unwittingly could the profit train chug down the track. The danger was that the star would find out. This is the danger in our capitalist world also. It is the core of reification.
Workers are the stars of capitalism.
We the workers are the core of capitalism. We who work daily for the boss are the ones who keep the boss in power. Cristoff could only be the director of the Truman Show if Truman continued to be the star. The capitalist can only continue being a capitalist if we continue to be workers. The Master is a master only if the slave is a slave.