i would hope participants would be decent enough to actually use sog properly not as a basically dead card. but the ruling does mean you have to have basically extra dead cards for one card you were never really planning to use i would hope that ruling would discourage people to use non sog using decks. I would also say number of copies should only increase by one as the number of sogs do, so one sog would allow 2 copies, 2 would allow three copies and so on