One benefit that the Airtel Night data plan has is that you can subscribe as many times as you can in one night, unlike that of MTN that you are limited to only one subscription per night. However, the Airtel night plan can be renewed if exhausted, meaning that you can subscribe again after exhausting the initial 1.5GB. You can also use 3GB for N100 in just one night. https://www.currentschoolnews.com/articles/code-for-airtel-night-plan/