you are so WRONG in your own 解读, esp the room cards

Many Asian and even European hotels incl the chains, the custom practice is ONLY ONE Room Card UNLESS you request the extra.  i even travel alone always ask for an additional card for the purpose of activating the electricity supply for the room.

Have you completely missed the post about how the writer complained he lost his room card and had to pay 50 CNY for a replaced one, and such wording was PRINTED on the card as an instruction but the writer missed it because he thought the card could be copied at literally a penny a card... 

Must say, your 解读出乎意料的主观.