by sjap
Idea of incentive to stay in Tokyo:If you've been a full turn on Tokyo you get as many points as live opponents not on Tokyo that turn (with a minimum of 2 points).
Examples:
In a 4 player game the monster on Tokyo would get 3 points.
In a 6 player game: 5 points if the monster on Tokyo is alone. 4 points each if there are 2 monsters on Tokyo.