An article called "The Slow-Motion Trainwreck Facing the Meal-Kit Industry" relates how the meal-kit industry faces the same problem(s) as Groupon:

"The problem Groupon faced was that their initial success validated a model that anyone could copy, and everyone who copied it increased both Groupon’s cost of customer acquisition and its churn rate."

https://medium.com/@byrnehobart/the-slow-motion-trainwreck-f...