The irony is that this is exactly the problem of current social media. Everyone can comment on everything in any way they like and there is no way to validate their affiliations, intentions, or sponsorships on scale.
All marketing online now is done through anonymous suggestions because if the way labeled promotional content became overbearing, so much subtle marketing is even embedded in popular YouTube, Other Social, and TV content now that it's insane, really not sure how to counter the deceptive trend because it only gets worse every time people try to call it out.