I believe one can observe the targeting by only observing the children. I ALSO believe this applies to all children in a social network where X between 1 out of 100 000 & 9 out of 10 have access to sites that are the works of the corporate.
The entirely new mechanics seems to be that most humans' will run on metaphorical stimulants & steroids on the metaphorical Wheel of Status. Humane behaviour (e.g. honor, respect, sincere curiosity) will become subject of learned helplessness. Before the child realizes that their toys are not the real things and the real things may be much more interesting; or before the child realizes they don't need to use the toys to satisfy X desires, they will have learned that status, EG pretty videos of using the toys, gets them what they want EG toys & attention from companies, parents & peers alike.