Who Really Profits The Most From Comment Spam
Typical comment spam is an attempt to get a backlink with a certain keyword phrase in the anchor text.

The idea is to get lots of backlinks for a particular phrase to a website. Usually, a “long tail” keyword phrase of several words that may only really get a few searches. This will boost the site in Google’s rating for that phrase and together, the phrases give the site the ability to get more traffic from Google.

Find out who really profits from all that comment spam