I am a bit disappointed that the article does not detail out, how the data was requested. I am pretty sure that when you ask "Give me all data about me <name>"

I am a bit disappointed that the article does not detail out, how the data was requested. I am pretty sure that when you ask "Give me all data about me <name>" that the response will be "We have not filed any data under <name>". I'd be interested in doing the same with Facebook and Google (I don't have accounts for both) but I am pretty sure that I get stonewalled. I thought about asking for the data associated with the tracking cookies they set, but I am not sure whether this works.