Your startup
probably shouldn't be focusing on a single go-to-market channel period. If you're a startup and you know exactly what channels work for you, you won't be a startup for very much longer. In my experience, half the battle in a startup is understanding the go-to-market channels and how to pull those levers.
As an aside, find it very odd that this blog post is written in the first person but there is no name anywhere on it.