Does facebook actually sell data? I know you can run ads, but the suggested practice currently is to leave the ad interests open and let the algorithm figure ou

Does facebook actually sell data? I know you can run ads, but the suggested practice currently is to leave the ad interests open and let the algorithm figure out the best users for conversions. Second, tracking likes and comments is required to offer the service you can't show likes and comments without it. And I bet that most of actually ad data is just weights in a neural network not even readable by humans.