I scraped a short sample of 1788 vBulletin sites, boiled it down to 1288 Viable sites with Check Urls (vbulletin) and removed non-viable sites from the list.
The I sorted the sites by the Status column, loaded the _db1.7.vpdb DataBase and hit Start->Create Accounts.
And got this popup straight away
InvalidArgument=Value of '1' is not valid for 'index'.
Parameter name: index
at
System.Windows.Forms.ListViewItem.ListViewSubItemCollection.get.Item(Int32 index)
at [].[].()
Also, the Scraper had a checkmark in Auto Remove Duplicate domains, but several of urls that I exported from the Scraper were identical - the list did in fact shrink from 57kb to 39kb when I removed duplicates with ZZEE Text Utility.