Gamium was a pioneer of the "social monetization" economic model, where users were rewarded for sociability. In the Gamium economy, most interactions take place through smart contracts. In order to interact with these smart contracts, you must pay $MST. Thus, most social interactions are related to cost. Getting paid and having to pay for interactions with other people may seem unreasonable, but this type of system has very interesting features, such as higher quality interactions and a significant reduction in the use of robots.