Curious, if Apple do not have this information on its servers, where does it have it? Locally stored on the users phone/Ipad/etc.? That cannot be right either. I can pull my Apple purchase history on my Windows using ITune, and it seems to be syncing to Apple (hence its servers), and doesn't pull Apple purchase history from my Ipad (where I do all the Apple purchases).

Apple may not pass those information to merchants, but they definitely seem to have customer information on their servers.