I think this can be associated to a quote that goes something like this, "Nothing worth having comes easy" or something like, "If it'seasy to build a backlink to your website, it means it doesn't carry much value"
If you submit your website link & give comments on other sites then you can easily get dofollw backlinks from reddit. Its having 6 pr bookmarking sites & its backlinks really helpful for increase your website ranking in SERP.