I also do not believe that the people selling secrets in e-books are making the money that they claim. If you have a method that really brings home the bacon, you keep it to yourself. Most of the e-book products that I've purchased on WF and other sites have been long on claims and short on proof and substance. If I learn one new useful tidbit I am usually happy with the purchase, but that is rare.
Google has most web site owners scared to death about SEO. The link building segment of the industry and the growing number of unscrupulous overseas SEO players really has done a lot of damage to the entire industry.
Most affiliate marketing sites have already been trashed by Google, even those that contain 100% unique content and have followed all of the advice from Google reps.
I see three areas that have a huge potential for growth, but each person has to figure out how they can make some money.
Video Training & Video Production -- Currently booming, but only a small number make any money.
List Building -- for those wanting to shake the Google monkey off their backs.
Mobile Web Sites and Mobile Technology -- about 20% to 25% of all web site traffic is from mobile devices, and growing quickly. It will likely be at least 50% in 2 years.
Most current money-making niches have either been trashed or are saturated.
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." -- Benjamin Franklin