Probably they go by number cause mine starts with 1 and got it as soon as I log in a few minutes ago. (it may be a few hrs before this)

I believe Nutaku did another mistake.

Tried the tutorial once and that's it. And that was even before the crossover event occurs. But my rewards are practically everything.

I am not going to complain about this!

Here's my evidence:

->Open Spoiler<-