Volunteer is a kind of safe earnings in the game. During one session, lasting 30 minutes, you can get a small amount of chips. The essence of the regime is that if you start the next work session no later than 10 minutes after the previous one, then the reward for it will be a little more. The third time will be even higher and so on. But if you miss a single session the reward will be reset to the minimum again and will have to start all over again.
And try your luck in the “Road roulette”, the first choice free.