Yuga Labs has said that, following the end of the three-week-long game tournament, the Sewer Passes with non-zero scores in the game will transform into something new, with the idea that higher scorers may receive more valuable NFTs.
This, of course, incentivized users to try to cheat in the game by creating bots, changing the browser-based game code to eliminate obstacles, or access game seeds that allowed them to predict the layout of a course run. Sewer Pass holders began paying others to play their game for them — either more skilled players, or players who were using these tools. Some were charging up to 2.5 ETH (~$4,200) to obtain scores of 700,000 or more for those who hired them.
Yuga Labs has promised to review gameplay to ensure that those who cheated are disqualified. They've also warned people buying Sewer Passes after gameplay ended that if they buy a pass that is determined to have cheated, it will be worthless. Some are skeptical of Yuga's ability to accurately detect cheaters, and others have expressed concern over false positives in the game's cheat detection that appeared to be caused by slower Internet connections.