Earlier quoted context omitted.
I also wish they would address: 1) why not open source the project? 2) why not look for someone to take it over and run it? I also have a hard time seeing how something like this could be at the very least not break-even (unless they had less than 10 paying customers or something).
From Leah at grove.io: Hi, Thanks for your interest in Grove. Unfortunately we won't be open sourcing the code due to the time and effort it would take to prepare and maintain it. Thanks for understanding, Leah
Not that I'm saying they have to release it (I respect their right to do whatever they want with their own work), but as far as reasons to not release something, that's pretty weak.