Originally Posted by
dcmidnight
Are the paid upgrades typically offered for just one flight or might you be offered the chance to upgrade for your entire trip - at least the same direction?
They can be offered for any flight - which is not to say that they are offered for every flight.
At OLCI, you will only see an offer for your first flight, if any such offer exists. Check at the self-service kiosks when you arrive in AMS to see if they are making any offers for your onward flight.