You've freed up 2 hours per dev per week so they can work on something else that might generate profit. Even if they goof off for an hour, that's another hour doing something useful that they weren't doing before.

You've also possibly saved some money by automating a task that was previously manual, reducing or eliminating human errors that could have compounding costs.

And as someone else pointed out, you've made the work environment a little better by not wasting the devs' time on a silly manual task, which might reduce turnover.