I’ll bite and say the reason this failed was the convience. If you merely set a carton of eggs on a weighted shelf and it would automatically order more when you’re low, it might’ve done better, and, been more generalist.

I’ll offer the optimistic hope that people are more willing to put a bag onto a scale after making a cup of joe with the added benefit of automatically having the “nuisance” of ordering and delivering solved. (Non perishable, etc)