I have been running my online business for 5 years now. I learn (and keep learning) all I need to know from the same, high quality source.

I get targeted all the time by adds on landing pages, email funnels, Facebook ads, etc. Some of these are legit, but thanks to my experience I can see that most of them are of poor quality.

They will never sell me anything, while they might sell something to someone that hates his job and is looking for another way to make money.