Podcasts are normally plain mp3 (or similar) files that get downloaded as-is off an rss feed, as far as I understand. I don’t think anyone gets extra ads outside the sponsored/host-read ones.

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jsheard 13 hours ago | parent | next [-]

The big podcast networks like iHeart are able to dynamically splice ads into episodes, so they can be targeted based on geoIP or whatever other signals they have on you.

	▲	zbrozek 9 hours ago \| parent \| next [-]
		I want a self hosted proxy for podcasts that strips the ads and compresses the audio stream harder before my phone downloads it.
	▲	pitched 10 hours ago \| parent \| prev [-]
		I listen to a lot of Stuff You Should Know and haven’t noticed. TIL I’m exempt from their targeted ads too!

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rchaud 13 hours ago | parent | prev [-]

Everyone posts to centralized RSS feeds these days. The company that owns the feed creates duplicates of the uploaded file, inserts ads into them, and serves a version of the file containing ads localized to the downloader's country.

If the same podcast is uploaded to Youtube through the uploader's official channel, it won't contain those ads and you're better off downloading that.