People now use these apps more and more, and youngsters even don't have a bank account, lol.
Anyway, I believe this feature will be implemented because of the demand, fingers crossed.
This means that these e-pays wallets vary from country to country, and we may not be able to use them worldwide. Even if some of them are used worldwide, the BK8 has to setup support for many e-wallets of different countries in order to activate this service. This might be a big hassle for them.
Also, if they decide to implement withdrawals to few e-wallets, other people will complain that their e-wallet is not support by BK8. Let's see how BK8 decides about this.