My local Indian restaurant offers tiffin service for CAD 250/month. That's enough food for my wife and I for lunch on the 5 out of 7 days of the week included in the price (and we usually have leftover Naan each day that we can snack on in the evenings). I would be hard pressed to walk out of a grocery store in Ontario buying fresh ingredients for that level of variety for 20 days out of the month. We can easily spend more on groceries each month for the 10 days that we do actually cook for ourselves.
Granted, this setup does require that you do like Indian food and don't mind having the bulk of what you eat each month generally be of that cuisine. But in our case the restaurant has enough variety that with both of us having a different dish for each meal there are enough dishes to choose from that we don't have to eat the same thing more than once all week.
With all that said, we haven't even talked about how there is no cooking or cleanup involved either, so there are massive time and convenience benefits as well.
But I can appreciate that not everyone would be satisfied with this.