A lot goes into driving traffic to a Web site.
Contests can attract visitors.
So can a strategic alignment or the time of the year. Sometimes a site's popularity can sink or climb simply on how it is categorized. Jupiter Media Metrix's rankings for February offer examples of all of the above. But the lower reaches of the top 50 changed. For instance, the online survey service said traffic on CitySearch's Ticketmaster Online site rose 13 percent over January after the site advertised a contest to win a trip to the British West Indies with nine single men and women.