Multiple times.
The logo at the top should take me to your product’s homepage, not your blog.
The article should link to it, every time you mention it.
In the end, recommend that I go see the product you mentioned.
I loved this article but realized I never bothered to see your site. It didn’t occur to me.
The blog post wasn't about us getting customers, it was about helping people startup.
We still got 25% of blog traffic to our homepage anyway. Would you still make the change?
When I click Start I'd logo I expect to be taken to their product website, not to the root of their blog.
I have nothing to support my opinion, and maybe most people use the web differently to me.
One of the primary goals of any new startup should be to get Andrew Warner to notice you.
I agree with the comment re logo... it just drives me crazy that people don't understand the mechanism of blog post lures people to the product site via the logo link.