You don't compress those files but windows does. Really there is no need to even show the files because you don't need to be in the folder.
But if some file gets added to the windows folder then you may want to have it to show up if you want to check it out.
I think if you ever get something bad on your computer then you want all files and folders to show up so you can find and clean things up.
But no green text files that I can see but I never went looking in every folder so there may be some but who cares. If I start seeing pink ones then I better get myself to the doctors.