The Area 51 page certainly makes it look like it was shut down for that reason. It says it didn't have enough activity, and provides a summary of the activity t

The Area 51 page certainly makes it look like it was shut down for that reason. It says it didn't have enough activity, and provides a summary of the activity that is all "Excellent" except for questions per day, which "Needs Work". Perhaps it was shut down for another reason, but that's definitely not how the Area 51 page makes it look.