No Market Share movement for vBulletin 5.x yet sorry.
Get a list of 5,960 websites using vBulletin 5.x which includes location information, hosting data, contact details, 2,201 currently live websites
and an additional 4,804 domains that redirect to sites in this list. 3,759 sites that used this technology previously and 1,428 websites in the United States currently using vBulletin 5.x.
Distribution of locations of all vBulletin 5.x customers we've ever tracked.