“A man has not everything to do, but something; and because he cannot do everything, it is not necessary that he should do something wrong.” [0]
Not only is there no reward, nor can you ever expect a reward, for doing the right thing, it also often comes at a personal cost.
[0] https://en.wikiquote.org/wiki/Civil_Disobedience_%28Thoreau%29
Only time this happened to me was one of my first jobs. I worked phone tech support for a consumer PC manufacturer in the mid to late 1990s.
The company decided their 3 year hardware warranty was suddenly now 1 year. They decided this retroactively... I thought it was wrong. I spoke up to my boss, they agreed and passed our thoughts up the chain, but after that it was all yes men so we never heard back.
I was just some on and off again college kid and figured, whatever, so despite the new rule change if I thought they should get hardware (I had access to their original warranty data), they got hardware. I mentioned it to other coworkers and they did the same.
Few years later the company relented after they were sued. Nothing ever came of my actions as far as anyone noticing, or at least not enough to care, pretty sure my boss knew.
Otherwise all my jobs are pretty run of the mill legal activity.