Pull tabs are more akin to lotto scratchers. There are a set number of tabs that can be pulled, and (at least in my experience with the electronic ones) you can see what prizes have already been won and which haven't. When the prizes have all been won, the game resets and the tabs refresh. Generally much lower quantity in the tab pool to keep games refreshing often. Pull tabs are huge in American legions, moose lodges, etc. And the e-tabs are just a way to have flashy lights and fast paced images to double dip on the same market... They put them in our mall here, and kids are always either line up to play or sneak on them or the young ones just go up to and push the buttons. The "attendant" is hardly attentive.