Great question. Currently there is no global redundancy checking, only locally within the same page. So two CSS files which are the same from multiple archives

Great question. Currently there is no global redundancy checking, only locally within the same page. So two CSS files which are the same from multiple archives are both kept. While this might not be ideal in terms of scaling to infinity, each archive + its dependencies are right now limited in size to 25MB, which should help keep costs under control until this is monetised. :)