The goal of the black hat is to make money as quickly as possible. The elite black hatters are smart enough to know when they have been beaten in a specific area, and will simply turn their focus to another topic.
Good points folks. It seems that still some people believe search engines like Google can be tricked by adding too many words into their pages copies and although such artificial tactics might temporarily help with the Yahoo rankings, but Google stats might get worse. Trying to act and work naturally is the best way to succeed in the SEO world.