Hi, I am working on an experiment and would like to test if it's possible to increase the most popular metrics with relative spammy backlinks and without de-indexing a site from Google. Can anyone recommend a handful of cheap services that will increase DA/TF/PA from 1 to about 20? I don't want to pay more than $10 for a package. I am doing this, because of two reasons: First: To see how much I should/must pay to boost a burn and churn site, and how long I can expect the site to rank. Second: To test how reliable the common metrics really are and how to manipulate them without de-indexing a site.