No Market Share movement for vBulletin 3.x yet sorry.
Get a list of 24,635 websites using vBulletin 3.x which includes location information, hosting data, contact details, 132,156 currently live websites
which includes 125,051 domains that redirect to sites in the list. 17,530 sites that used this technology previously and 4,002 websites in the United States currently using vBulletin 3.x.
Distribution of locations of all vBulletin 3.x customers we've ever tracked.