I know many people play on mobile phone in some games. Quite often you have to wait for something like at doctor appointment and you have nothing else to do and game on your phone looks reasonable thing to spare time. I played many types of games, but I still don’t understand how people are spending money on certain things in games.

1% Spending

For example, Clash of Clans and many similar games. Say to upgrade some tower, you need 20K gold. Your gold mine produces 20K per day. Your successful attack will bring you 40K. So, you wait day, or attack somebody and got enough money to start upgrade. Looks reasonable. But next level you will need 40K, then