There was no sale. Cambridge Analytica used the free, public API just like any other FB Platform developer, including 15-year-old me. Users clicked through OAut

There was no sale. Cambridge Analytica used the free, public API just like any other FB Platform developer, including 15-year-old me. Users clicked through OAuth consent screens to share their data with its personality test app. It being a social network, much of that data involved their friends. Bank transactions are not "your own data" any more than what CA scraped from personality quiz users was "their own data." In both cases, there are people on the other side of each record.