I am also interested in the question regarding content. What can you say about copyright? When a user provides content, he is the only one who has the right to correct it, criticize, make it public, etc. How in this case is the contract with the publisher?
as far as I assume, under the contract you mean either the transfer of copyright, or the license of your content, or cash payment. And in return, the publisher receives content that he can dispose of for a certain time. Am I right?
you are absolutely right, only in this case everything is not quite as you say. Since this is a social platform, the user uploads the content and automatically becomes its owner: the content cannot be used without permission. Also, it does not require certification and registration.