I know players who earn more than 10,000dec a day playing Splinterlands, that's 10$ give or take...some earn 50,000dec....depending on the geographical location of where the person is, that amount can be really worth it. People need to buy DEC to up their game, so it keeps going round. Morever, splinterlands has just few thousand players per day, when it gets to millions, then the DEC's could be worth much more