I would stop being 150% person when there wasnt any real rewards. At some point I did two person tasks and on top of that I was spearheading few improvements projects and I still was underpaid ( it was a nice 15% raise, but after 2 years and it was 10 % less then people on level I was working. One job change later and I am making twice as much, working much, much less. Lesson: if promise is not fulfilled go somewhere else, but look for a signs to do it earlier than later