Where do they come from?
One word.
Wert.
As to where do you get the answer from? Not spent much time there myself. Always seemed easier to blag a resurrection or reincarnate, especially as the penalties for the Oracle are progressive.
Getting the answers from an OOC source would actually be cheating, though naturally hard to prove.
But you can still send and receive tells when sat with the Oracle. Personally, after mulling over the riddle myself for a while, any character of mine would probably then start to call on the resources of his friends. Or even complete strangers, if it came to it. Some people are actually good at these things. Others have just been there too many times before
And yes, dying is undoubtedly the sting in the tail of curiocity and wander-lust!