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. 
Testing can be conducted sequentially or in parallel. In sequential testing, often the easiest to implement, the various versions of the webpages are made available online for a specified time period. In parallel (split) testing, both versions are made available, and the traffic is divided between the two. The results of sequential split testing can be skewed by differing time periods and traffic patterns in which the different tests are run.
Committed: Ideally, you want to close the deal when all red flags have been dealt with. In reality, most deals close while critical red flags still exist. At this point, you have provided the customer with a proposal that outlines key contractual terms. When a customer has agreed to move forward with a deal, they are “committed” (also known as “verbal commitment” or “verbal”). What remains is to work out the details of the contract, delivery and payment, all of which have the potential to“undo” the commitment. The commitment may be offered contingent upon certain terms being met.
Netflix changes its background image based on what movies and shows are being promoted. Their site is very simple. There’s a risk reversal right off the bat. You can cancel any time and not be locked into anything. You can try it free for a month. They’re not saying, “Hey, this is movies streaming online.” They’re relying on the power of their brand.
Of course, implementing this isn't easy. You need to first develop your stories, then decide on how you're going to convey those stories and at what drip-rate. For example, your first email or two might go out on the day they first signup, then one email per day might go out afterwards. How much of that will be story-based and how much will be pitches?

Clickfunnels: Review, Demo, Pricing and Features: