I have a list of nearly 30,000 backlinks I've done over time at 75 sites, and I want to make sure they are indexed and stay indexed. Then I heard the best thing to do is to build backlinks of backlinks. I just jump 400,000 comments from the blog of success in each of the backlinks ScrapeBox 30k (about 13 for each backlink backlinks), but they are all more likely "nofollow" on links autoapprove blogs and Google said in their support for webmasters links t site, they don 'nofollow crawl so I was wondering if it was just unnecessary. So now I consider bookmarking the 30,000 backlinks with Demon bookmarks (and I will make sure to write only dofollow bookmarking sites). SB and BMD were the easiest I could come up with. Is there an easier / simpler / better my backlink backlinks to ensure they are indexed (and send a little link juice)?