The OP,
bobbybrown, who's an expert with KE and knows a lot about the ICN route already mentioned that this fare not that unusual for this route. So, let not jump the gun and worry about lawsuit or anything like that at this point. I'm sure that most normal U.S based travelers would not have jumped on this deal since it's not originated in the U.S. There's probably only a small number of FTers who would be interested in this deal anyway.
Originally Posted by
bobbybrown
FYI, one-way fare from west coast to ICN costs around 500 USD at lower season. It's not error price and 500 USD was there for a few months, so please don't hurry for this ticket. SFO-ICN nonstops (OZ/KE) are usually 495 USD except Dec and May/June/July. From LAX and YVR, MU offers nice price to Seoul but requires overnight at PVG.