Hey there,
I don't know the exact rules regarding exploits, but since it's a singleplayer game I think it's alright to post them here. If not, moderators know what to do
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After having collected the remains during the Buried Secrets quest, and upon returning to Wirtan, it's possible to get in a dialogue loop that keeps on giving money (and I assume but haven't checked-- Aggressive disposition).
Link to images showing how it's done: http://imgur.com/a/gPo3C
Text-version: - Select "I found more than bones"
- Select "[Might 15] [Lift Wirtan off his feet] I will crack your head in two if you lie to me again. [Aggressive]"
- Select "Throw the remains at his feet"
- Select "Fine, keep your silence. I want my payment."
- Select "I found more than bones"-- and repeat.
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Love the game!