@John_Scotus
It's called occupying a niche. A platform with investor funding needs to pay off the investors eventually. If the user/donor model doesn't pay the bills, it can't pay the bills plus the investors.
Coso not being beholden to advertisers makes it unique. It doesn't have to serve every person on the internet as long as there is a sufficient minority of people willing to pay for a non-advertiser-funded platform.