Also reasonable! A little annoying though, since I find most people are better served by uniform paychecks, but I understand the celebratory aspect.
(I've worked at places where your "bonus" was regular, until it wasn't: that did not go over well...)
We nailed the three engineering goals by about October. Sales didn’t hit their goal. No bonus for anyone.
You want to build animosity in a company? I can’t think of a better way than that.