例如,城市飞艇 [1],他们声称
Reach each all users, not just opt-ins.
Since Rich Push messages are stored in an app’s Message Center,
they can be delivered to all app users, not just those who have
opted-in for push messaging.
任何人都可以提供更多提示吗?有什么缺点?如果这种方法有效,那么为什么还需要 Apple 或 Goolge Push API?