Confirmation the Stormwind Skychaser and Orgrimmar Interceptor BlizzCon rewards are two-seater mounts! http://www.wowhead.com/news=271800/blizzcon-2017-virtual-ticket-on-sale-stormwind-skychaser-and-orgrimmar-intercept …pic.twitter.com/MU4HpePJoh
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Once you convert them to http://Battle.net balance, yes, you can use that balance to purchase the Virtual Ticket to gain these. :)