Well, apparently whether or not you can use IBT depends on the trust score of your account (from what I've read.)
For me, this is apparent. I kind of cocked up setting up my account, with different names all over the place, but provided all the necassary details to get my account unlimited for the second time. (I was suprised they didn't send me the cease business email.)
Had the account for nearly 6 months now, no disputes, still can't use IBT. Have a verified CC and Bank account on it as well. | 
