I think it has more to do with doing her own thing.
Remember she left CNBC and came to Fox Business with the promise of doing multiple shows on Fox Business and Fox News.
If you look at the numbers, she could start a podcast, work far fewer hours, make the same or more money in the process.
If you look at the viewership of the top podcasters they dwarf cable news, in a matter of months she would probably have a much larger audience than she was getting on Fox Business or Fox News.
If you look at Megyn Kelly, after she got fired from NBC, she has now started a podcast and has nearly 5 million subscribers on YouTube and is probably making more money that she was making on NBC or Fox.
5 million YouTube subscribers generates maybe $100k per month. Not comparable to a network host.