|If you add vacation time to time left instead of grace left you would loose them if you make a move (unless coded differently). For example if you have a few minutes left before you leave and decide to use them to make a move. Or if you have a few minutes of internet during your internet free vacation or... |
If you code it differently and add it to time left and keep it added after a move you have a kind of grace time hidden beneath time left. Making it more confusing.