The first component of Google's trust has to do with age. Age is more than a number. But it's not just the age when you first registered your website. The indexed age has to do with two factors: i) the date that Google originally found your website, and; ii) what happened between the time that Google found your website and the present moment in time.
Gaining Google's trust doesn't happen overnight. It takes time. Think about building up your relationship with anyone. The longer you know that person, the more likely that trust will solidify. So, the reasoning is, that if Google just met you, it's going to have a hard time trusting you. If you want Google to trust you, you have to get other people that Google already trusts, to vouch for you. This is also known as link-building.
Yes, the more links on a page the smaller the amount of page rank it can pass on to each, but that was as it was before. With regard to what happens to the ‘missing’ page rank, it seems that if this is the case all over the Internet, and it will be, the total amount of page rank flow is reduced the same all over so you don’t need as much page rank flow to your good links to maintain relative position.
A great number of public networks call themselves “private”. That’s not true. If the network is advertised, it cannot be private. We witnessed cases when Google destroyed such public networks and all the websites which had used them. They are easy to be revealed due to a huge number of outbound homepage links which are irrelevant to each other. Their posts are short, and they cannot really block SEO crawlers.
Many years ago, low-quality SEO firms loved to abuse the comments sections of blogs, forums, and news sites as a way to build backlinks for clients. This approach is pretty ineffective these days, as most reputable sites that are worth having backlinks on have responded to such abuse by making all such links 'nofollow.' While sites like Quora and industry-specific forums are great for sharing your expertise and raising your visiblity, you're not going to get any SEO value from them.
The flood of iframe and off-page hacks and plugins for WordPress and various other platforms might not come pouring in but I’m willing to bet the few that come in will begin to get prominence and popularity. It seemed such an easy way to keep control over PR flow offsite to websites you may not be ‘voting for’ and afterall, isn’t that way a link has always represented. It would seem Google should catch up with the times.
Make it as easy as possible for users to go from general content to the more specific content they want on your site. Add navigation pages when it makes sense and effectively work these into your internal link structure. Make sure all of the pages on your site are reachable through links, and that they don't require an internal "search" functionality to be found. Link to related pages, where appropriate, to allow users to discover similar content. Denver Page Rank Click Here