I've built 7 web 2.0 sites with around 6 to 10 articles on each with 4 or 5 keywords on each web 2.0 linking back to my money site. 4 of these web 2.0s were expired tumblrs I bought and 3 wordpress I created, the wordpress sites I have bought 14 pbn links with spun articles that I have written. In the past 7 days I have moved up from page 5 to page 3 on 5 keywords and from page 10 to page 7 on 3 other bigger search volume keywords. It seems to be stuck around position 25 and 60 for 8 keywords, the site is only 6 weeks old. What strategy do I need now, more web 2.0s or add more backlinks to the web 2.0s or buy pbn links to my money site?