At one time I felt like I was going to be one of those people but very glad I decided to keep working as additional income because a few years later it slowly declined when google decided big brand were more important search results.

I feel like if you get your traffic from a source and also sell on that platform at some point the company sees you are successful and cuts you out. We see it with google search result taking content and presenting it at the top. Or Amazon scanning for profitable niches on the platform and pushing their own product.