There are 3 currencies in game:
white crystals - account bound
blue crystals - server bound/rooster bound
gold - server bound/rooster bound
yet there are shop items which can only be purchased ONCE per account. So everyone who wants to switch server cant purchase said items again because the availability shows 0/1 - even if its a complete different server REGION! Makes absolutely no sense and is just one more reason NOT TO SWITCH servers.
Also product inventory is server region bound - NOT accound bound. So you have white crystals account-wide available but the stuff you buy with it is server bound and you cant activate/access stuff from your product inventory in another server region. But “somehow” the other server region knows your excact white crystal amount.
I tell you this is on purpose and another reason NOT TO SWITCH server region.
This system is plain stupid - if you want players to switch servers - make product inventory region unlocked.