Hi. I added 5 pbns 3 weeks ago and another 5 last week. My own, not public. But i see no significant improvements in serp, results is very poor, like movement from n\a to 70 for 2400words keyword, my main keyword which is 14000 dance between 90 and n\a, some lowcomp moved 60 to 30. But it is not result that i expect. I used different anchors for each pbn, 6 for main page. All pbnsites have tf20-30 without spamlinks and with links form authority sites. 5-8 pages. Moneysite also has links from web2.0 and blogcomments for diversity. is it mean i have to build tens of pbns to rank? May be better buy links from sellers, because i see no solid results from my own network which is too expensive to build.