@Kibbelz since so many ppl got the free transformation box thinking it was free it will disappointed to remove it now and in same time its not fair for ppl who did not pick the box
so best solution is sent free survey to whoever did not receive the box
but doing that will kill the new event since top drop is that transform box
so you add additional key on store for every account so ppl can farm 1 box and open the other one for free
and trust me from my exp on game i tell you 1 legendary transform wont damage the game balance