How to filter by number of posts?

First of all to avoid confusion, I'm talking only about contextual links (articles) and the links are made by gsa ser.

Besides my post, there are other thousands of other posts by other people 99% of them are made with gsa like mine, some of the sites have even more than 100k posts. As far as i know the link juice will be divided to all the links so websites with many posts are useless even if the site has high PR/DA/TF etc.

For example this website (http://www.hiverse.com/) has 2848 pages with 15 articles/posts on each page and each post has 1 or more links, in total there are probably more than 50k links so you'll get very little link juice from it. That website is an Article Script (engine), here's an example of a BuddyPress (http://www.scootergoods.com/groups/), it has 14606 groups/posts. Pretty much every minute a new post appears on this site, a link from this kind of sites don't hold much juice and most of the gsa made contextuals are like this.

So my question is: is there any way to filter sites with maximum x number of posts or the only way to get quality links is by buying/manualy making them?

I think thats why people are selling their special GSA ser lists.