No Market Share movement for vBulletin 5.x yet sorry.
Get a list of 5,754 websites using vBulletin 5.x which includes location information, hosting data, contact details, 4,997 currently live websites
which includes 2,799 domains that redirect to sites in the list. 3,556 sites that used this technology previously and 1,464 websites in the United States currently using vBulletin 5.x.
Distribution of locations of all vBulletin 5.x customers we've ever tracked.