Oh your opponent can get a lucky pickup with either Jars anyway ;;
The thing is, Cyber Jar can also be highly offensive by flipping it faceup on your own turn to blast their field, and create possibly more than one tribute fodder :x
Hm, no love for Fiber Jar or Morphing Jar 2 from the crowd? Plus, where's the Dice Jar and Jar of Greed option :x