I don’t think podcasts belong in the tv section, it should be completely separate from tv and movies. I guess TVDB allows them since podcasts are episode based.
I’m not quite sure what to do with any existing podcasts on the site. Web series might be allowed on TMDB in some cases, for the others we can keep them on Trakt, just without any further updates. If it’s already ended, that’s not a big deal. For ongoing web shows that is a challenge and I don’t have an answer to that yet.