Magazine Distribution: Three Types

Thanks to Wikipedia, I have finally seen the light (the good, realization kind of light). After 6 searches on Google to try and find distribution methods, I had only gotten countless statistics, charts, and how-to's on starting your own magazine. That made no sense at all when all I clearly typed was "magazine distribution", I guess it wasn't specific enough. I had avoided Wikipedia since we had been brainwashed since middle school to avoid it, but I was desperate and had no other choice. Finally, I clicked the infamous wiki link and found this: "Magazines can be distributed through the mail; through sales by newsstands, bookstores, or other vendors; or through free distribution at selected pick-up locations. Sales models for distribution fall into three main categories. Paid circulation In this model, the magazine is sold to readers for a price, either on a per-issue basis or by subscription, where an annual fee or monthly price is paid and issues are sent by post to readers. Examples from the UK include Private Eye Non-paid circulation This means that there is no cover price and issues are given away, for example in street dispensers, airline in-flight magazines, or included with other products or publications. An example from the UK and Australia is TNT Magazine. Controlled circulation This is the model used by "insider magazines" or industry-based publications distributed only to qualifying readers, often for free and determined by some form of survey. This latter model was widely used before the rise of the World Wide Web and is still employed by some titles. For example, in the United Kingdom, a number of computer-industry magazines use this model, including Computer Weekly and Computing, and in finance, Waters Magazine. For the global media industry, an example would be VideoAge International." http://en.wikipedia.org/wiki/Magazine#Distribution