They basically pumped up Trump because it made them more popular, kind of following their audience zeitgeist.

And now that he’s unpopular (to a degree), they’re backing off thanks to their lack of spine.

Plus several subjects like Epstein were very much brought up all the time, and the administration has done a 180 on those. So either the podcasters bank on their audience short span of attention or keep on working on the same subjects that increased and loyalized their following.