No Market Share movement for vBulletin 3.x yet sorry.
Get a list of 24,359 websites using vBulletin 3.x which includes location information, hosting data, contact details, 6,749 currently live websites
and an additional 124,842 domains that redirect to sites in this list. 17,610 sites that used this technology previously and 3,825 websites in the United States currently using vBulletin 3.x.
Distribution of locations of all vBulletin 3.x customers we've ever tracked.