Hi friends, I have build some tier one back links, ten Web 2.0, video, PDF and ppt, I didn't use spun content, they are all manual, now I want to build some tier two links to boost tier one links, should I buy some SEO service for tier two or should I buy GSA+vps+Captcha+proxy? I think SEO service is more convenience but I don't know if there is any risk. Can anyone give me some advice? And the second question is should I still update the ten Web 2.0? Or I should create more new Web 2.0 . Thanks for your help.