1350$ per month is still fraction of salary of developer. So if it saves you that fraction of your (or your colleagues) time, it is definitely worth it.
Though, your example still does not mean you lost. that 1/100 time is time that developer is not working on something else, that might be worth much more (though if ita 1%, its less likely. but my point is that developer time is more valuable than proportional amou t of his salary).