So these are the files EA was revering too after asking the gamer if he/she was okey with that EA would collect data from the gameplay?
Otherwise I can't think of any other reason for it's existence.
I don't think so. They can only do that if you're connected to the internet, and I'm barely ever connected while simming (moreso when I got my Strange File). Therefore, I can't see a way for them to be the collection files.