I think it's a very good question, and yes as far as we know, it's still shared. Information brokers aggregate whatever they find, and this includes data from o

I think it's a very good question, and yes as far as we know, it's still shared. Information brokers aggregate whatever they find, and this includes data from other brokers as well. With Facebook in particular there's a concept called a "shadow profile", which are supposed to be people who haven't registered at Facebook, but some data is still associated to them.