Unless you pay, you always end losing. You start earning a lot of cups and coins for some time while getting confident, but suddenly, you star playing with people with boosters impossible to win and you lose everything. If you want to play for free you need to assume that. Dangerous for people with game addiction. That's why I rate it so low. To play safety, uninstall the app when losing and start all over again and just have fun. Do not get discouraged.