I noticed that some of the users have website in there profile. But when you click on there name in a post and click on vist there website it takes me back to vbulletin.org. This is because its reading the users website as.
https://vborg.vbsupport.ru/www.myuserswebsite.com
Look here for an example.
https://vborg.vbsupport.ru/showthread.php?t=69454 Click on his name and place you mouse of the website link and notice what it says on the bottom of your browser.