Maybe those predictions simply weren't as credible as you thought?

Federal wire fraud (and conspiracy to commit the same) has a maximum sentence length of 20 years. I guess she could have gotten 80 years if all 4 convictions were ordered to be served consecutively. I don't know how common consecutive senteces are vs concurrent.

In federal prison you can only parole at a maximum the last 15% of sentence, so she well serve the majority of the time (if held up on appeal etc., etc.)