You make a promise to do a reasonable job. Sometimes it's the company that makes a promise for you (feature and deadline specified) and then it's not really your responsibility to complete the promise.
I make a promise to trade around 40 hours of labor for money each week.
You must have not had shit management yet, or are cruising for burn out.
Yes, and when the pay/bullshit ratio goes in the wrong direction, I get another job.
Little did they know the promise being talked about the promise sales makes to customers.