I've read that you can award a $150 bonus to another colleague, at which point a manager can approve or block the award. The second part,- manager blocking her from getting the bonus is what sparked the additional controversy.

edit: sibling comment says $100, could be either or.

Fellow Co-Workers nominate someone for a peer bonus, and if approved by a manager (edit: or whomever is responsible for approval), you get an extra $100 on your next paycheck (on your gross pay at least, but still nice).

A bonus you get for doing something that helps your peers with their work, even if not directly related to your responsibilities.