Ashley Ruba, PhD You know I'm here for it! Can't resist a question: Is this a good thing for you or for Wiley?
An advance looks good, but it might still mean surrendering more than 80% of profits to a traditional publisher. If you've already established your credibility and have a readymade book-buying following (50K+) and can keep 80% of profits for yourself, that's some math to think about.
Traditional publishers typically rely on authors to do all of their own marketing now anyway. Unless they can show a clear benefit to you, they might be peddling perceived status as their value added. But we gave up those status games when we left academe, yes? :)
You might be the only one who needs to give yourself permission and reach for this book. Food for thought.