I hear a lot of people put down pr0 backlinks yet when I check my competition backlinks, they have links from tons of pr0 sites. It seems that a pr0 site can help establish your keyword ranking in serps if you use the right anchor text in your link. For example, if my anchor text is Asian Dating and I use those keywords in my backlink, even in tons of pr0 sites, it still helps establish my keyword ranking in google search.