There is real gold out there for free, and if you absolutely must spend your money frivolously, there are copywriting books on the Kindle for under $5 that will give you everything you need and more.
This just isn't for you but I can see it having tremendous value. I work as a sole developer in a marketing department where I need to be an expert in web development and marketing. I have a lot of experience with landing pages (I usually create like 3 a day at least) but I'm still interested in the product and here's why:
The valuable thing about this is that it's a product that's been thoughtfully organized and crafted by someone with a good reputation that I trust and who has proven to most of us I think that he's definitely credible on the subject. I could find the free stuff if I wanted to but having it all organized, curated, and formatted for me plus the actual product he'll be launching saves me tons of time and effort. I could spend the equivalent of $300 worth of my time to get the information myself or I can send Nathan my $300, save that time, and become an even more effective marketer faster, which then gives me time to not only make back what I spent but turn a profit too.
Edit: Grammar.
In this case however, there is already an abundance of superior quality ripe fruit in the orchard waiting to be plucked. And it's free.
I believe that the point of ConverKit is to simplify and streamline the process of creating a landing page and drip email campaign. It seems like a pretty good proposition to me! I personally found the step by step process in this little walk though very valuable - especially as I'm writing a sales page myself at the moment.
I personally think seeing the iterations and tweaks was fantastic. Seeing both the process in both text and visuals was where the gold was for me.
The only thing I was thinking when I saw the final/current design was that it would sense to me for the reader to scroll (slightly) to be able read "Your funnel has a hole in it". You've created suspense/tension with the headline and a more effective resolution might be with a physical action by the user, rather than just by reading. It might help to get them commit to the rest of the page.
Thanks for putting this out there Nathan, much appreciated.