Yup, agree totally. Only way it can work is if the org running it is a not for profit with great transparency, which hopefully is what we will see with the likes of Lemmy etc.
There is an argument to make that things like reddit or even Facebook (original fb, not what it is now) should be publicly owned services. They CAN provide value to society, similar to how a town hall can.
I just finished watched Alone: Australia, one guy didn't eat for over 20 days. Fasting may be a good option for avoiding needing to poo. I'd imagine you'd have to start that process maybe a day or two early. To get the best effect.