Also, work the conversion math out if you'd like: 40k visits, 5% will open that link, 3% will purchase, ~8% affiliate fee on $15 book = $72. My weekly rate is $30,000. This post took, essentially, half a work-week to write. It's not worth bothering with.
I'll bet at that rate people will try hard not to waste your time too, that alone is worth it.
But I'm concerned that you either woke up at 5am to read comments, or you stayed up all night.
The most interesting bit is how fast his time has increased in value, four short years ago he was still employed at some reasonably (by SV standards) low monthly wage working insane hours and now he's making as much or more per week as most of his former colleagues make per year.
That's a pretty good raise. And it did not have the risks associated with doing an all-out start-up associated with it either he's applying the lessons he learned running his own smaller business to larger businesses that are prepared to pay for that knowledge.