It matters because it screams "I don't actually know what I'm talking about". And it's not just a bookkeeping error. It's a conceptual error. It's a complete misunderstanding of the time value of money.

As such, it's a self indulgent piece of writing.

Seems a little harsh and unkind over what's just a fun article. It's not a news publication or a textbook, it's Phrack, lol. I thought it was neat.

It's a blog post. And the criticism is on a message board... It's par for the course.

Classifying Phrack as a blog is about as accurate as classifying future interest payments as liabilities.

He's explaining the time value of money but uses an example that accrues interest before any time has passed?

He's explaining a bond, ie. it's a promise that you'll get back X+Y in Z years if you give up X now.

She