The 6 tags per hotspot will probably only help rural people to be able to get tags on two systems at once. When I can currently pass a hotspot and get my mother's Mii a week after she visited the hotspot, it means there are simply not enough people in my area. They need to either make it send you 6 tags randomly from a centralized database of recent tags from all over the world, or just allow random StreetPasses over SpotPass, or StreetPass when you and a friend are online at the same time... just anything that broadens the scope for people who just don't have very many 3DS owners in their area.