I have faced a lot of times at a chat or some Q&A site a reply:
Care to elaborate?
As far as I understand, the poster is asking for more details or explanations.
However, in this case, I'd use more polite "Would you elaborate?", because the word "care", in this context, sounds a bit offensive. Am I right or I misunderstood a "flavour" (I don't know how to call it as a non-native speaker) of this is a widely used phrase?
Should I understand it as passive-aggressive, neutral or even polite?