A scary fiction:
With perfect algorithmic efficiency, Facebook found you a beautiful wife who was practically guaranteed to produce a sickly child. Nothing too bad, mind you, but just ill enough to make you spend a little bit more than you would otherwise.
There’s no malice here. No human ever decided to profit from your misery. The constant A/B testing with billions of reactions just so happened to engineer a situation to help you breed a better human. More profitable human.