How is Facebook’s privacy in even the broadest sense better then those of Mastercard and visa. They run experiments on entire groups, this list is longer than I

How is Facebook’s privacy in even the broadest sense better then those of Mastercard and visa. They run experiments on entire groups, this list is longer than I can possible fit in this post. The biggest fear you can have for Mastercard and Visa is that they accidentally give away your private data for free to the world instead of selling it off to some data aggregators.