Nice example of URL refferal seo spam
 

Stumbled upon one expired domain and it seems all backlinks what it have is coming from statistic pages,which are generated by script like webalizer.While such method maybe worked before dont think it can work now in era of panda and penguin.Which is probaly why it ended expired.Stil,someone snapped it before 3 days,i guess he wants to drain seo score despise bad method.
Domain is pornstarsnudity dot com,take a look with openseoexplorer to see those funny backlinks.

google loves tons of backlinks.
google hates tons of outlinks.

I still get bots visiting my stats page so they will show as a link in my referred sites column.

Yeah quite funny how it good 51 score on page quality score.

They probably had a ton of outlinks. Not enough stat spam will help them.