The legal bits

• You must be 18 or over, and somewhere Polymarket allows trading. See where Backd works.
• Backing a call is buying shares on Polymarket with your own money. Every call can lose its stake. Only back what you can afford to lose.
• Backd never holds your money and never takes the other side of a call. Orders execute on Polymarket under Polymarket's terms; Backd's fee is collected by Polymarket through its Builders Program.
• Leaderboards, Swipe and challenges carry no prizes from Backd. Winnings are what your shares pay.
• Backd never helps anyone around Polymarket's or a local regulator's restrictions. In some countries Backd itself isn't available; visitors there see a notice.

The full terms and privacy policy cover the rest.