Realized: corporations do not care about people as anything besides commodity. Corporations do not perform acts of good will. Corporations are supremely pragmatic.
When this became clear, it was very easy to stop doing favors for Corporations unless it was agreed that the favor would be returned. The only means a Corporation has for returning favors is by giving monetary gifts. Do not give Corporations the benefit of the doubt. Do not care for a Corporation more than it cares for you (not at all). Do not confuse a Corporation with the individuals it employs. The office is a place for work.
Enterprise fortitude: a soothing cocktail of pragmatism, drive, and focus downed with a wink and a grimace before entering.