You have to pay for EVERYTHING. There are no videos to up your coins, no free boosters, no videos for basic boosters; no way for you to continue playing for more than 10 minutes if you lose. They do post gifts on their Facebook page, but it's maybe once a week, if that. Go ahead and enjoy the game, but if you plan on saving your money when you run out of everything, expect to wait a few days while collecting your daily 100 coins so you have enough for just a basic booster (which cost 100-150)!