We can lower our shared expenses by pooling together like a family would, sharing accounts while paying 10-20x less than you'd normally pay for the same services.
A Netflix premium account costs $15 usd / month. Even shared between 2 people that's $7.50/month. Shared between 20 people it's < $1/day. With collectivized living, we can share access to the same amount of entertainment options, for significantly less cost.