This was fairly common in the spamming industry. They call it joe-jobbing. The way it works is when you run a site that is promoted by spam, you need special ho

This was fairly common in the spamming industry. They call it joe-jobbing. The way it works is when you run a site that is promoted by spam, you need special hosting that costs 10-30x more and can tolerate complaints. Let's say you have a competitor or someone annoying, you goto his corporate site and pay someone couple hundred bucks to email millions of people linking to your competitor/enemy's site that isn't on spam-proof host. The host will get complaints about that site for spamming and pull it down. It's a pretty petty thing and doesn't really accomplish much in the long run. Fineprint: much of my knowledge is almost a decade old.