Earlier quoted context omitted.
Sending a small item like that as a prize for a contest seems reasonable. The design of that keycap on the other hand is ridiculous.
It does not make any sense, I have no use for it. I work only on a MacBook.
However, it does make a nice little trophy/trinket. It's merit based, so getting one could become a goal for contributors. It's branded. It fits on a desk.
If they made it twice as big and called it a trophy, it'd probably make more sense. But then costs would be higher and it'd be more formal.