Also interested to see how this solves the 'hate and harassment' problem. Will the USD 5.00 fees cover things like background checks for extreme viewpoints, handle verifying real identities to check against blacklists, and pay for moderators to review posts for harassing content, monitor user complaints, and adjudicate between parties that feel they have been wronged or unfairly treated. Then there's fake news - they could use ML algorithms or pay for human fact checkers to verify posts, but the problem of dealing with mistakes and false positives is still there.

Like the previous comment states, this might be easy to handle when the users are a small group of like-minded friends, and maybe simple ad hoc processes will do for a while after that. The problem is, these sites are only useful when they have a much larger user base, but scale will also bring exactly the same expensive and difficult problems as FB, Twitter etc.

Something to bear in mind as well is that online hate and harassment is not new. Pretty much immediately after the first electronic forums or message systems were created and made available to end users, the problems started. The issue is with people, not the technology, so technological solutions are not the answer...