A litmus test for your idea

You missed the point of the OP. Please try reading it again.

The litmus test is not how many people you can get to read your blog. It's whether you're teaching people how to do something that you can sell a solution to them later:

OP: "Are you teaching anyone who looks like someone who would buy what you intend on selling? If not, why not?"

This is a test that is a necessary, but not sufficient condition for the validity of an idea. If you pass this test, you don't yet know if this is a good idea. But if you fail this test, then you defn know it's a bad idea. The value of this test is that it's easy to setup, and relies on your actions, rather than what you tell yourself--which is more truthful. Sometimes ideas are bad, not because they're intrinsically bad, but because they're a bad fit for you, which is a good thing to test for.

And context of all advice matters. This only applies to ideas that are movements, not powder kegs or empires (via gabriel weinberg) http://www.gabrielweinberg.com/blog/2010/02/are-you-building...

Ask for pre-orders. In my experience I've found a substantial difference between "yeah, that sounds great I'd probably buy it" and... "here is my credit card". You'll find that even if you collect a large list of emails from people that said they would buy your product, when it is time to ask them to make the purchase the majority of them will come up with objections and reasons why now is not the right time.

With pre-orders you have people that have given the ultimate commitment and you can offer them a discount and/or the ability to help shape the product through it's development.

A simple billing page with something like Stripe checkout (https://stripe.com/docs/checkout) will help you filter out the tire kickers and attract people with a burning need for your product/service.

Mind sharing the URL?

you got slash at the end of the url, maybe that's the reason?