A: You can get it by successfully inviting friends to play Block Me actively (the quantity and upper limit are subject to the in-game instructions).
A: No. Revival are only used for revive in the game and do not have the attributes of real-world currency.
A: It includes stranger messages, friend messages (chatting messages and gifting records), system messages (updates, events).
A: It is planned to open the online multiplayer Beta in version v2. Please pay attention to the system message for the specific time.