Gift economy
A gift economy or gift culture is an economic model, where goods are not sold, but they are given away, without an explicit agreement for immediate or future rewards.  There are social norms and customs about the exact way the gift is given. In a gift culture, gifts are not given in an explicit exchange of goods or services for money, or some other commodity or service. In contrast, in a barter economy or a market economy goods and services are exhanged for a received value, usually money.