There are 8400 words in the report I referred to. It could be considered a mini-book, but as an in-depth legal report about a subject, the number of questions people commonly have, and providing answers to those questions, dictated the length.

You may want to download several free marketing reports, or reports in your niche, to compare their content and word counts.

"Kindle" does not mean you need buy a Kindle to read them. There is a free Kindle reader to download to a computer, which is what I use.

I have read several Kindle downloads available from Amazon that were less than 10 pages. Even though they were free, I was left a little disappointed because they were short and generic. I think you can really stand out and get traffic by not doing what everyone else does, but by making sure your content is better and more specific.

There is nothing wrong with reviews, but why limit your income and type of website?

There are a couple problems with just relying on reviews.

First, that limits your income to product reviews and product review sites, and products with affiliate programs. That will not work for most sites.

For example, I have web pages targeting non-product searches, use AdSense to monetize the pages, and rely on Google finding something relevant, usually a service with no affiliate program to advertise on my site.

Second, your affiliate link may be blocked so in effect your product review is blocked from making you money. This is more likely to happen when using an affiliate or CPA network where links are routed through the network's url. Since only affiliate links go through the url it is easy for an ad blocker to know it is an affiliate link and to block the url.

Commission Junction links are commonly blocked for this reason.

I have not used Keyword Elite so I do not know how it compares to other products.

In a recent niche where I know from experience a ton of keywords are searched on, KSP returned 456 results. The Google keyword tool returned 31.

If you were creating a site with a page devoted to each phrase, most marketers would have a 31 page site. I would have a 456 page site.

Perhaps even more important is that Google does not disclose many long tail keywords. Although individually their traffic counts may be low, in the aggregate the volume is significant and these are commonly the buying keywords.

This is where the money is made and why only relying on Google is dangerous.