This funnel is a starting point to a funnel with landing page, OTO-page and thank you page. You can optimize it to your liking. I use Clickfunnels for all my funnels and I highly recommend it due to their analytics. Without analytics your funnel is useless as you do not know at what point people drop off your funnel meaning you can not fix what you do not know.
For instance, if you’re running an accounting business, at this stage your leads would be comparing plans offered by different service providers. They might need resources like how to evaluate the landscape of accounting services (i.e. whether to hire a solo accountant, an agency, etc.), pricing guides (so they know what ballpark rates are), or how to choose an accountant.
How many people could be inside the Amazon funnel? Basically anyone. Not only does Amazon offer a mind-boggling number of products, but it also offers a broad array of highly desirable personal and business services, including cloud hosting and fulfillment. In addition, Amazon’s platform that is so technologically advanced that it allows almost an infinite number of people to be in the platform at any given time.
Say you’re into cycling and you’ve decided to purchase Trek’s latest Emonda line road bike. You read a few less-than-positive reviews online, but brush them off on the understanding that all Internet comments should be taken with a grain of salt. After all, people only review products and services that they absolutely love or absolutely hate – but most customers fall somewhere in between.
As a software engineer myself, I can tell you that building funnels from an application standpoint takes massive amounts of work. There's a great deal of coding and integration that's required here. From email systems to landing page implementations to credit card processing APIs, and everything in between, so many platforms need to "talk," that it takes the bar too high for the average marketer.