So I just bought a 10K verified and it's been almost a week and I haven't see any significant boost in the SERPS. I previously bought 1K of pr 3+ and it gave me a top 15 and 30 from 200 position. The thing is I did some extra efforts to try and index those backlinks. I'm not sure if the impact was mostly from the link juice of the PR, since those 10k backlinks are prettymuch low PRs. I'm just asking my self if it's worth to work those backlinks and get them indexed or should I just let things go..