I was exploring my TYP accounts and noticed that there's now an option to "Combine Accounts" with regard to TYP online. I remember in the past I couldn't find a way to do this online so had to call in. I combined my Prestige, Preferred and Rewards+ (previously another Preferred) by calling in. Is there any disadvantage to doing this online, with regard to maintaining benefits of each card? (ie, 10% rebate from Rewards+ when transferring from Prestige to airline)