It's not much of an incentive if you just publish all the UUIDs on a public website and who they voted for. If my employer says 'let me see your UUID and if you voted for Bob Jones you get an extra day off!' I can just find a UUID that voted for Bob Jones and give my employer that and they won't be any the wiser, regardless of who I voted for in reality. Recording results is no big deal as long as they aren't provably my results.