I understand that it is possible to share internet as we have done it between ourselves. My issue is that I don't use the internet on a timeline (morning to noon or something like that). I use the internet throughout the day on and off, so sharing with people not in my cabin would not work very well.
I wish the internet packages were similar to Princess where you can buy a package for 4 devices for a deal then I would gladly share. But for 1 device only, it would be too hard to manage the 'sharing'