Sounds like she doesn't want the loss on her record and hopes that the history books will forget all about her little stunt.
Up until the Michael Flynn case she was involved in, she had been regarded as a decent prosecutor with a somewhat impressive record, and a history of philanthropy efforts.
Sidney Powell worked in the Department of Justice for 10 years, in three federal districts under nine United States Attorneys from both political parties. She was lead counsel in more than 500 federal appeals.
Sounds like either she "took the money" from Team Trump and got stuck "holding the bag" when things went south after Rudy & Co hung her out to dry...
Or she went down the rabbit hole of conspiracies and lost her marbles.
A 10-year DOJ veteran, in multiple districts, and being the lead on 500 federal appeals cases...all of the sudden buying into those nonsensical conspiracies with a complete lack of evidence sounds like either having one's judgement clouded by perhaps promises (financial or professional?) from the Trump admin...or maybe the Trump admin convinced her that they had sources and evidence she could work with, that they really didn't have
...or it's an abandonment of common sense and logic on such a ridiculous scale that it's basically on-par with if Neil DeGrasse Tyson came out tomorrow as a flat-earther.
I guess all 3 scenarios are technically plausible. People have been known to "take the money". Team Trump has been known to "sell a bill of goods they can't deliver on", and Rudy himself is proof that a one-time great prosecutor can go completely off the rails. He went from the prosecutorial hot shot who was instrumental in taking down The Mob...to a guy who couldn't even figure out how to book the right venue and ended up giving a presser in front of a Landscaping company because he booked the wrong "Four Seasons"