The biggest point made here is the following: whatever perception you have about money, you are right. If you think you can't make more than $1k a month, you are right. Same with $10k, $100k, etc.

The author stunbled with this by accident. I bet you he will now focus on finding another product that will allow him to repeat that.

Another minor point is that marketing works. Its up to you to find what. So don't stop when your ad words campaign fails. Keep iterating.