There are a number of good reasons to use curation when you're building backlinks. I ran an experiment that lasted about 6/7 months. I built out a small network on 33 individual domains. I let the pages sit for many months just to be sure the results were consistent..
I'm showing some results of what's possible if you set up your backlink campaign right with Curator Contender and Money Robot. All too often users blame automated linkbuilding softwares for not working anymore or being obsolete.
In principle, content curation is as old as the first time books or other writings were sorted by theme. According to Google Trends, however, it has only been structurally recognized as a potential part of a marketing strategy since 2012.