This approach is used by wechat, you can't make your own account and can only be invited by an existing user. I suspect that wechat has reached enough market penetration that this is now worth it.
There are tricky requirements for Americans
This approach is used by wechat, you can't make your own account and can only be invited by an existing user. I suspect that wechat has reached enough market penetration that this is now worth it.