One of the nice things about podcasts is that usually you can usually still subscribe to them via RSS without being tracked. Advertisers however are trying to find new ways to track your listening habits and target users for ads:

Advertisers are projected to spend more than 800 million on podcasts in 2020, and companies are devising ways to provide them with data that will persuade them to spend more. The most common tactics include using IP addresses to identify users, adding tracking URLs to ads, and abandoning RSS in favor of proprietary platforms that already track their users.

Read the full article from The Markup here.