Group boards are where the real traffic is on Pinterest. I have seen tons of fashion group boards out there that have 50K+ followers, but are very suspicious about inviting new people and never respond to emails. Looking for a few partners to help build a womens fashion board. I am gaining a few hundred followers a day just doing it by myself. You can use pinblaster or whatever tool you want... but they need to be high quality pins and not crappy shots from amazon. PM me for more details.