People used to sell software. Now they give away the software, but get first dibs on hosting it for a monthly fee. Works well for anything that Amazon can't be

People used to sell software. Now they give away the software, but get first dibs on hosting it for a monthly fee. Works well for anything that Amazon can't be bothered hosting :-), basically apps not infrastucture (although this title wierdly calls itself infrastructure, but that is probably sales hyperbole).