What exactly is the difference between authenic and inauthentic speech and who is doing the labeling? What is stopping an "authenic" source from taking money to

What exactly is the difference between authenic and inauthentic speech and who is doing the labeling? What is stopping an "authenic" source from taking money to launder authenticity? The term 'Authenic' is often used as a deep well of bullshit to arbitrarily filter ingroups and outgroups with about as coherent logic as middle school students deciding what is cool.