In most U.S. cities, this is illegal.
In fact, Google got crucified when they did that originally for Fiber in Kansas City and a bunch of minority/low-income communities didn't make the list: http://www.wired.com/2012/09/google-fiber-digital-divide. Embarrassingly, the sign-up map was divided right along the road segregating black from white neighborhoods.
Even after Google lowered the sign-up requirements so more poor neighborhoods qualified, the sign-up rate for gigabit service was only 10% (and only another 5% for the free service). http://www.wsj.com/articles/google-fails-to-close-kansas-cit.... In most places, 30% is more like the target for what justifies build-out.