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Fresh links on sites with high authority can queue new links and sites to be recrawled. Our index starts from 0 each update so we would need a reason to recrawl external domain with links. Most sites the have continuous link building are kept updated in our index. There has been new links discovered and are in the queue to be processed which can appear in the next 1-2 updates: https://moz.com/researchtools/ose/just-discovered?site=www.copyblogger.com&filter=&source=&target=domain&page=1&sort=crawled