PASADENA, Calif.--(BUSINESS WIRE)--Aug. 30, 2004--eHarmony, the Internet's premier relationship service, marks its fourth anniversary, having grown to more than 5 million users, with over 6,000 marriages and hundreds of thousands of relationships..."It's interesting to observe how the industry is now seeing what I have known all along: that mate selection is a very complex process," said eHarmony's founder, Dr Neil Clark Warren.