One Line of Code Earns $$$ Thousands

This incredibly appealing idea usually turns out to be one of the following

Add a chatbot to your site (to sell your product in chat)

Add a retargetting pixel to your site to advertise to the visitors on Facebook

The problem most people will have with this is you still need to have a great product that people will want to buy, and/or you also need to be good at selling it. On top of that, you will need to spend the money on the ads or the sales people to convert the leads.

This is a little bit like saying "I put one simple sign on my shop and now I make two million dollars a year" and then you find out the sign says "OPEN" and it's on a Nike shoe store.