Leaving before you give a reasonable return of service for ratings or training, is just shooting yourself in the foot...
You will simply get a reputation that will follow you...
If I employ, and train/type rate you, I will ask that you stay for a fair, and agreed length of time to make the cost worthwhile.
I don't however, believe type ratings should be used as a form of bonus, or instead of paying someone properly. I will type rate you as an operational necessity, not as a reward.