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Look up what 'pay-to-win' means in this context (https://www.urbandictionary.com/define.php?term=pay-to-win). You increase your chances of winning by paying.
"It's not a competition to win a prize"?
From your webpage:
What is the purpose of the game? The game is designed for Bitcoin enthusiasts. The goal is to solve puzzles and complete tasks to find three keys, each a part of a Shamir recovery seed. The first to recover all keys and solve the seed wins 1 BTC.