wow, that is quite a story
I had one for 5 lunches at a VERY high market deli in Leeds.
got massive doorstop bread or panini, fruit, crisps and drink (drinks were all special branded ones 'yorkshire Lemonade' etc, the sort that cost quite a bit)
Cost me £8 for 5 of these lunches which works out at £1.60 a day in total
Had queues going out the door when I went in at lunchtimes to get it, they can't have made a profit and I seriously doubt they got THAT much repeat custom after the people had used their vouchers