A post by Ben Kepes over at CloudAve got me thinking about the economics of on-demand services, so I thought I’d do a quick blog. On-demand services businesses come in all shapes and sizes. This is particularly true today with the emergence of SaaS, where the vendor diversity is staggering. Despite the diversity of services – ranging from traditional communications services (think voice, video and data) to highly verticalized SaaS applications (think point of sale applications for yoga studios) – the fundamental economic building blocks of these businesses are, for the most part, the same.