Many of the sites are PR 5-7 sites and not spam sites, they are just profile links on well known sites.
Sure, I could build 5-10 backlinks daily to each article by hand but that takes too much time.
Is there any software that builds these backlinks. I enter my email and log in and they auto verify and build the backlink?
Or is there a site that takes a monthly small fee to build these backlinks?
After all, these fiverr sellers are clearly doing automated link building.