Notice that they are not actually providing the raw data; they are providing access to a dataset that has been anonymized using differential privacy. This is a

Notice that they are not actually providing the raw data; they are providing access to a dataset that has been anonymized using differential privacy. This is a way of adding noise to the data that makes it impossible to tell (much better than random guessing) whether a person is in the dataset, even by combining the dataset with external data.