ATL is a city you 'get money' in legally/illegally + everyone flooding down for opportunity, thus you got everyone you need to blow (dudes who do videos, hoes for your videos, studios everywhere, clubs to play your music, its the hangout spot for all black celebs and many of them live here), you have everything in one place you need to do the ground work for your project for the low because everyone is trying to make a name. If you stick to your region you pretty much stuck with only dealing with major players or internet dudes who are popular and can/will tax you, all for you to maybe not pop because the clubs in your town hold no weight. ATL is also cheaper than LA so its easier to take the risk of moving down and doing the 'artist struggle' life.