Award seem to matter

Yesterday at work I completed a safety matter quiz and because I did that I received some jcpenney printable coupons as gift. When I told to my colleagues who refused to complete the quiz that was extremely easy and it contained only 4 questions like: Who should provide first aid in case of a workplace accident/ what are the general factors that can cause fire/ what type of fire extinguisher should you use to extinguish a laptop on fire/ what is the assembly area?, and that I received a gift, they regretted that they don’t completed.