Completely fair question, and you are correct – time will tell! Until we’ve got it right, we are going to keep a much closer eye on the rooms that are qualifying each month.
If we find new ways people are gaming the system, we will adapt and adjust the program requirements accordingly. Also, if I find anyone intentionally trying to game the system, I will ban them under the Three-Strike Policy (and I may even choose to skip to a higher strike 
).
Edit: I also want to clarify that while these costume park rooms look successful, they actually just flood their rooms with tons of low quality traffic. Players are not actually meaningfully engaging or spending in those rooms.