Did you see this article?
Suit claims Match.com set up fake dates
Cnet ^ | 11/18/2005
Excerpted:
"In a separate suit, Yahoo's personals service is accused of posting profiles of fictitious potential dating partners on its Web site to make it look as though many more singles subscribe to the service than actually do."
http://www.freerepublic.com/focus/f-news/1525045/posts
Yes, I have heard about these scams.