The key part is to 'act in the best interests of [the company]'. Maybe loss leaders helps build the user base, or helping another company means building a future portfolio that spreads the influence of the company. Both of these would be seen as a death sentence if "maximize profit" was the only goal.

It could be argued that killing the company for a single quarter's highest profits could be seen as an act against the best interests of the company, but proving that can be impossible (unless the person in charge ends up parachuting out immediately afterwards, and even then they would have to have some hard proof against them.)