As soon as I saw the starter pack something came to mind; If i buy the starter pack, after that there should be an identical pack, just named intermediate and with a 2* item, I mean does three rings want to make money or not?
All they need to so is open a new tier of the pack after you buy one, leading up to the 5* unique 'grand master' pack that has 2 uber items, maybe one random weapon/one random armor.
that seem a bit too sinister even for OOO