If you tell him that you need to charge money when you want to chat with someone you meet by chance, but when you follow him, after you establish a friend relationship in this case, you do not need to charge money for chatting with each other, because you are already friends, when you want to follow him after removing friends, you need to pay a certain fee to follow and chat.
Before there is no attention, it is necessary to charge money to chat, and each other can talk without spending money.