This things were implemented long before ethereum was created
before nexus and before EOS.
The question is, even if this things existed before why are they not used so much?
Is all decentralized all free no ICO , IPO, tokens or other shit to be paid:
https://prism-break.org/en/all/#social-networksYou really thing that blockchain is needed for this kind of stuff?!
Why every developer tries to crates it own "blockchain" decentralized platform / product
instead to contribute to already existing open source projects?!