Hacker News Reader

> Sure, you could just pay $5,000 a month to a website to show a banner ad directly, but a larger % of your money would be wasted

How do you know that the waste is higher with the banner ad?

Because the banner ad generates less revenue than $5,000 worth of advertising spent on something else.

And you know this how, if you're not running banner ads to test? How do you attribute the revenue?