I'm not sure why this would be wasted anyway. If you are a food processor turning this into frozen diced foods, soups etc, why would you not buy this cheaper produce? You are throwing it into a big grinder/dicer/slicer, anyway so your customer never gets to see it was misshapen.
Personally I reckon this is PR fluff that Intermarche have deliberately cooked up spun to get some positive PR in the blogsphere. That food is not wasted. It is used in other channels, albeit that it does not make premium prices.
Even if fed to pigs it is not 'wasted'.
Besides there is just not THAT much of it. 1.2 tonnes per store is nothing. That is 13 cubic feet of food.