I had a job I did not hate, but two of my teammates left and, just in case, I started looking for a job. I got an offer for $25/hr extra and my manager offered

I had a job I did not hate, but two of my teammates left and, just in case, I started looking for a job. I got an offer for $25/hr extra and my manager offered me $50/hr extra. Of course I was very happy (and stupid). He made me work 70 hours per week and after 8 months I never got the increase. On the exit interview, his manager, which was a good boss, told me: "I'm sorry I don't have much time." I said: "It's OK. I don't want to waste your time," and I left. The next day he arranged a nice exit lunch and invited the two coworkers that had left earlier.