Wow, interesting, thanks for sharing this. I actually called in to try adding existing bookings to my 'registered account', but I was told this isn't available yet. Then I pulled a half-dykwia and asked if it'd affect revenue tracking for non-CX elites. The rep said that has nothing to do with this registered account thing and would depend on name and DOB and not this feature......
Long story short, I wasn't able to add my existing (plethora of) reservations to the registered account and was told not to bother anymore
PS i called HK IT assistance, if that makes a difference