Cheat the Clock
You can modify your device settings to earn great rewards in a short amount of time. If you don't mind taking that step, quit your game and head to your device's system settings. Adjust the clock's time forward at least four hours, then open the app again to find that you have earned whatever you would have if the game were actually running during that time. You can do this as often as you like.
Lobbies Mean Success
The bulk of your income will come from the various lobbies, so it's important to devote a lot of attention to them. You need to unlock new ones on a regular basis, but you also need to improve the ones already available. The bests strategy is to stick with whatever effort you can take most conveniently, rather than saving up for the ones that are more difficult to obtain. Even less impressive lobbies can quickly become useful if you're ranking them up and the speed with which they produce income is steadily improving.
Upgrade Promptly
When you can buy an upgrade, do that. It might not seem impressive at first, but it will get there as you continue to improve it. However, you should start with two upgrades in particular: the flat sum tap bonus first, and the percentage increase bonus after that. The reason is that those will give you more bang for your buck, so to speak, so that every action you take thereafter will yield greater rewards than it would have. After that, just go for the updates and upgrades as they come your way, without worrying overly much about the order.
Various Gameplay Tips
As in many other mobile games time cheat works here as well. Quit your game and head to your device's system settings. Adjust the clock's time forward. Open the app again to find that you have earned.
Start the game with these two upgrades as soon as possible: the flat sum tap bonus and the percentage increase bonus. Simple reason since they will give you more bang for your buck in the beginning than any other.
Lobbie as much as you can, that is the secret ingredient to democracy and income in this game. Unlock new lobbies on a regular basis, but also improve the ones already available.
Even less impressive lobbies can quickly become useful if you're ranking them up and the speed with which they produce income is steadily improving.