Better than these services would be a site that tells you how to shop for meals and prepare them in bulk -- sort of "make your own meal kits". It would be more efficient, healthier, and more educational.
While yes, I can spend time researching things, picking things out, etc. all for free, sometimes I do just want the experience to be catered. Add on top of that an automated, weekly/bi-weekly grocery list was pretty damn cool. Otherwise, I typically end up making the same boring meals I already know.
I didn't continue with them because my boyfriend is a pretty amazing cook, so I just leave cooking to him instead haha
Though it needs a CSA mode so you can tell it I got way too much swiss chard and it needs to be cooked..