The IOCCC29 winner writes each frame as fresh C source, compiles it, then runs it.
In January 1994, the MTA officially debuted MetroCards as part of its effort to phase out subway tokens. Now, the transit agency is working toward having a completely contactless fare payment system.
As of now, there are no such expired codes in the game yet. So, consider redeeming the current ones right away to get their rewards. The best place to find newly released codes is the PAINT or DIE ...