If you look at some published data from a while ago, Blue Apron has 15% user retention after one year, Hello Fresh 11%.
As a consumer, at first might sound a good idea and convenient to order pre-made food you don't have to cook but soon you realise it gets quite expensive compared to just get your groceries delivered and cook.
I don't know in the US, but in Europe for an average family of 3/4 members using meal kit companies is bloody expensive in the long run and you can't even get meals for the entire week.
Also if you get 2/3 meals a week, then you have to shop for the remaining days and you inevitably end up wasting food.
Personally, I don't event think you can compare meal-kit companies with the likes of UberEats or Deliveroo. The latter can reach economies of scale far more easier than the former.