The amount of money they will get has not been made public yet but it won't be much. There is a safe somewhere in Utopia with an unknown amount of dollar bills in it. When they've found it, they obviously can't spend it right away. They don't have an internet connection for online shopping and they don't have a phone to call the local supermarket. They are allowed to 'use' the live streams though. So if they are creative enough they will call out for our help. They can, theoretically, make an appeal on people living close to Utopia and ask them for help on the live streams. Even though the pioneers are not allowed to leave Utopia, everybody with a passport can come in. Utopia viewers could buy some fresh vegetables for the Utopians, deliver the groceries to the gates, show the receipt, get your money back and that is that!
The pioneers will not have many rules to follow but they are definitely not allowed to accept gifts. That would make their stay in Utopia a party from the beginning. If they want something, they will have to pay the normal price for it. If they want to have luxury, they will have to work hard for it. If they want a medieval society they can grow their own vegetables and become knights. Anything is possible inside the gates of Utopia.
A good way to make some money fast is by giving tours to visitors or make something like a bed & breakfast.