These are other 3rd party softwares that you can use to get backlinks. They are not as effective as guest posting, but they do create backlinks. That is why they are cheap. But if you want a better way of getting backlinks, you should do guest posting.
Backlink Machine 2
Backlinks have been the most important SEO factor for rankings since the beginning of search engines. But to get backlinks, website owners normally have to hire SEO agencies and spend thousands of dollars. But NOT ANYMORE. Now all you have to do is… Click a few buttons. Backlink Machine can also be used to sell backlinks. It costs as USD22 and if you plan to use it regularly, then it is USD27/month to get credits per month.