PBP is sort of a cross between a traffic generator and a multi-level marketing scheme, only without the threats that MLM traditionally entails. You’re not absolutely required to sign up under someone, though the program does cost money on a monthly basis. You’re granted access to traffic generation tools, as well as other promotional information and training. The MLM comes in with their referral commissions, which many people use more than the marketing tools themselves. There’s a sizable commission for enrolling new members, as well as seeing them succeed.
Websites produce traffic rankings and statistics based on those people who access the sites while using their toolbars and other means of online measurements. The difficulty with this is that it does not look at the complete traffic picture for a site. Large sites usually hire the services of companies such as the Nielsen NetRatings or Quantcast, but their reports are available only by subscription.
You have also mentioned Quuu for article sharing and driving traffic. I have been using Quuu for quite sometime now and I don’t think they’re worth it. While the content does get shared a lot, there are hardly any clicks to the site. Even the clicks that are there, average time is like 0.02 seconds compared to more than 2 minutes for other sources of traffic on my website. I have heard a few guys having a similar experience with Quuu and so, I thought should let you know.
Not all web traffic is welcomed. Some companies offer advertising schemes that, in return for increased web traffic (visitors), pay for screen space on the site. There is also "fake traffic", which is bot traffic generated by a third party. This type of traffic can damage a website's reputation, its visibility on Google, and overall domain authority.