Back to It is possible to grind in other account to have more coins?
You can put up a card on your main account and buy it with your side account. Do it at your own risk because you can be banned. The safest way is to buy the card you want on your side account, and trade it over to your main account.
You can put up a card on your main account and buy it with your side account. Do it at your own risk because you can be banned. The safest way is to buy the card you want on your side account, and trade it over to your main account.