Impossible to create
Gating everything behind paid (but with no ads) likely would hurt a significant amount of lower income users.
The TOR network is probably the closest thing to what OP is describing but that is filled with illicit material and has no safeguards. We all pretend we don't like internet laws but those rules keep criminals below the surface and normal users from accidently stumbling on it.
Anonymous KYC is the way forward. Legislation on preventing bots presenting as legitimate users should be implemented. Similarly to how the world has mostly made robo calling illegal.
So, the precursor to online media has already gone through this paradigm shift.
Which is partially true, but it only shifts the distribution of the problem. Once your service gains enough popularity network effects cause it to gain value. You have to worry about high priced buyouts of the entire service (great for the site owner, terrible for the users).