A megacorporation doesn't act like my 85 billion neurons. A corporation acts like a forest of trees, or at best, an anthill. Corporations (and simple organisms) respond to their environment, but not necessarily in incentive-driven ways. Often, corporations move opposite incentives not because of some local minimum or whatever, but because it, for example, personally benefits the CEO, a few board members, or a group of employees.

I can set up "incentives" for an anthill, in the form of a mixture of sugar and borax. Emergent behavior takes over.

The behavior of corporations, at the scale of Google, Facebook, or similar, is almost entirely emergent dynamics. Same thing for countries, for that matter.