Nothing, only you are getting 5 X TP. Buying business class tickets will result to sudden burst of TP
But if plat card, got insurance coverage that you won't use.

Well, my spending are quite low most of the time of rm1000 to 1300.
But suddenly I got transferred to Middle East to work, can buy business class tickets. Return ticket price is rm8000, so bought 2 times and you do the maths

my previous experience when buying iphone5 two years ago, they will process manually for the payment..
meaning they will call you to verify your cc information only will proceed to charge your card..
I remember they call me on sat evening..
not sure they do the same now or just special case because they are launching new iphone during that time..

nice find!   
those website details always late the jackpot is in the selfcare 

UMobile now using new payment gateway (Maybank), provided by Infinitium e-Payment. previously was using Global Payment provider.

now i'm worried. hopefully the new payment gateway also uses Mobile MCC. if not, jialat liao. 
Here's the sweet screenshot in Umobile selfcare: