The referer spam on my blog has gotten awful. Twenty sites a day show up as supposedly having linked to me. Somehow I don't think prozac.best-buy-site.poker.xxx.tk is really legit, though.
One of the spammers is adminshop.com. They advertise a product named "Reffy", which for $50 (PayPal, natch) offers "mass referrer marketing". Even better, it "comes with a pre-generated list of 3047 active blog websites". Including, presumably, mine. I guess this is my punishment for having an automated referer backlink two years ago, before nofollow.
Dear Reffy author. Your use of my site is not authorized. And because you're advertising access to my site as part of your package, I expect a license fee. I'm a reasonable guy: $5 per sale will do it. Just email me for payment instructions!