The likely answer is to do with audience biases. A survey conducted by an email marketing provider is almost certainly going to have different results to one conducted by PPC management tool, as their audiences have different skillsets and biases, skewing the results of their sample. As such, we should take the specific ranking of different strategies in these studies with a pinch of salt.

Below is a screen shot of a program called Zennoa which l reviewed and was in the pre-launch stage. Google did not even know that program exists and ANY website could have ranked for that search term. There is really no point in wasting valuable time flogging dead horses. There is no need for another review of Empower Network, Vemma or those MLM ancestors … LOL.
In the old world of information scarcity, the concept of “lead generation” meant marketing found the names of potential buyers and passed them to sales. Buyers expected that they would have to talk to sales and sales expected to speak to uneducated early stage buyers that may not yet be qualified. This has all changed. Today, buyers can do their own research online and can find a variety of educational resources through search engines, social media, and other online channels. Through content resources, today’s buyer can learn a great deal about a product or service before ever having to even speak to a sales person.  So businesses must make sure that they build their digital presence.
Chadwick Martin Bailey, another expert market research firm, reported that up to 51 percent of Facebook users and 67 percent of Twitter fanatics will most like purchase recommendations from brands they are a fan or a follower of. Such is the impact of Social Media on lead generation and sales that revenues are expected to go up exponentially in the coming years according to experts like eMarketer in their report on the US Social Network Ad Revenues 2012-2015.

ROI is probably the most important metric in lead generation. The calculation is fairly simple: it’s the profit or loss you make from investing in a lead, compared against your initial investment. Let’s say you spent $15 capturing each lead, and a lead is worth $20 to you. Your profit from a lead ($5) against your initial investment ($15) gives you an ROI of 33%.

The reason I started Apache Leads way back in 2003 was that I was a Diamond level distributor for a San Diego based MLM company and had quite a large business. None of my associates had any access to leads, so that's how we got started. The demand for leads grew so fast that I had to focus on getting quality, affordable leads in ever increasing numbers.
Cost per thousand (e.g. CPM Group,, also known as cost per mille (CPM), uses pricing models that charge advertisers for impressions — i.e. the number of times people view an advertisement. Display advertising is commonly sold on a CPM pricing model. The problem with CPM advertising is that advertisers are charged even if the target audience does not click on (or even view) the advertisement.