Earlier quoted context omitted.
Every transit system should have a “tourist day pass” that is moderately expensive but allows you to use anything for 24 hours or so.
Yes like in london. I bought a 24h pass at 8pm, only to find out it's 24h only if you buy it at 00.00, because they all expire at midnight. They are basically running a legalised tourist scam over there. I can imagine hundreds of thousands of people falling for this.
(They expire at 4am, though the point remains.)