For me at least, this is largely self-policing. The people and sites who I would actually trust in purchasing decisions would take pains to disclose any compensation regardless of whether the FTC mandates it. Trust is a market.
> Because the whole world isn't twitter, and hash tags don't always make sense. how do you hash tag a segment of a podcast?
Obviously you should use a medium-appropriate disclosure. My issue is that the FTC seems to believe that "#sponsored" isn't even appropriate for platforms where hashtags are used (like Instagram).