To piggy back this comment, Federated Learning actually has a lot of other uses beyond just crowdsourcing. It has benefits to data privacy also. The medical industry has struggled sharing their data with other institutions without compromising their information. They're using it to decentralize the model making process.

Intel is doing some work with Penn on the subject now, if people want to read further: https://www.intel.com/content/www/us/en/newsroom/news/intel-...