I pay for Spotify, Netflix etc. to avoid ads. Some podcasts manage to incorporate ads tastefully with respect for the listener. Others are not done that well, and produces the same horror as when you're used to Netflix and suddenly see how a show looks with frequent commercial breaks on a hotel TV.
Here's an idea: Crowdsourced ad-filtered podcast RSS streams you have to pay to access, where the profits go back to the podcasts themselves. Users mark the start and end of the ads in the podcast audio, and a podcast player skips those parts. That's something I would pay for, and hopefully would generate more money to the producers of podcasts than ads.