You need some token(REL) for betting. You can buy it at 'Uniswap Exchange'. And them
You can earn tokens by upvoting posts. You have 3 days to upvote a post after it goes live. If that post is upvoted by high-Reputation users, you will earn some tokens. You don't earn tokens from posting content, only from upvoting. Upvoting is sort of like a prediction about what posts will be deemed valuable by reputable members of a community. Tokens represent ownership in Relevant (imagine if the first Facebook users got some facebook shares!).