Originally Posted by
WorldLux
The Lufthansa one seems a bit like a scam to me. On my last LH booking, LH offered me fixed price upgrades and "bid for upgrade". The minimum you could select in "Bid for upgrade" was only marginal smaller than just paying for the upgrade straightaway.
Probably depends on a route. I've upgraded from economy to Premium Economy on KUL-FRA route for 900RM which was less than $200.