Xbox Live Indie Games didn't support Leaderboards. So several XBLIG used various methods to get around this limitation. Some used a peer-to-peer system to provide in-game leaderboards, but this required Xbox Live Gold, and became fragmented as the player count dropped. So most yyrGames titles used a system called Internet Ranking. The games would provide 16-digit alphanumeric codes that corresponded to your score or time; yyrgames.com would accept these codes, and post your results.
After 11 years, and after accepting 619 entries from 178 unique players, Internet Ranking was closed on November 23, 2019. The most popular leaderboard, Snake360's Course 1 on Easy, contained 54 entries. To all players who participated, from the bottom of my heart, thank you very much!