Having internal restrictions for the account does not have anything to do with bots or gold sellers, it just makes it impossible to benefit from having other characters on the account - can’t give your twinks money or items, and vise versa.
The ability to do so is one of the fundamentals for MMO games. Not having access to it makes the game unfun and kills any motivation to level up different characters.
It has been more than a month ever since the following statement was made, but nothing has changed:
Finally, after considering the arguments stating that making team storage a premium feature is irrelevant to preventing gold sellers, we’ve decided to lessen the restrictions on this part. We will be modifying this feature for the upcoming patch.


